92 REFERENCES Al Ruzzi, R. (2016). Developing national occupational licensing system for subcontractors and technicians in construction (unpublished Master Thesis). Islamic University, Gaza. Afolabi A O, Ojelabi R A, Omuh I and Tunji-Olayeni P 2018 Building Designs and Plumbing Facilities : the Implication for Rising Int. J. Mech. Eng. Technol. 9 1336–44 Arthur, R., Rouf, F. A., Rahmayanti, H., & Maulana, A. (2019, December). Plumbing work competence instrument in the field of civil engineering. In Journal of Physics: Conference Series (Vol. 1402, No. 2, p. 022019), IOP Publishing. Australian Business License and Information Service (ABLIS), (n.d.) The Plumbing Code of Australia (PCA). Retrieved December 15, 2021 from https://ablis.business.gov.au/ Australian Building Codes Board (ABCB) (n.d), National Construction Code Retrieved December 15, 2021, from https://www.abcb.gov.au/ Britannica, The Editors of Encyclopaedia. "plumbing". Encyclopedia Britannica, Retrieved November 28, 2021, from https:// www. britannica. com/ technology /plumbing. Burgon, R. D. (2009). Water and sanitation–don’t forget the plumbing. Desalination, 248(1-3), 468-475. Burgon, R.D. (n.d), The Role of the plumbing industry in global health. Retrieved from: https://www.worldplumbing.org/wp c Content/ uploads/ 2016/11 /Bonn_ presentation BURGON _ 25April_07.pdf Canadian Council of Directors of Apprenticeship (CCDA) (n.d.). Red seal program. Retrieved November 15, 2021, from https://www.red-seal.ca/about/pr.4gr.1m-eng.html Creswell, J. (2009). Research design: Qualitative, quantitative, and mixed method approaches (3rd ed.). Los Angeles: SAGE Publications Department Employment & Training (n.d). Licensing standards and training packages Retrieved from https://desbt.qld.gov.au/__data/assets/pdf_file/0021/8238/ Dorsey, S. (1983). Occupational licensing and minorities. Law and Human Behavior, 7(2-3), 171. 93 Dotson, Elina (2021). The importance of plumbing work in construction Retrieved August 05, 2022, from https://www.housepict.com/the-importance-of-plumbing- work-in-construction/ Fernando, P. G. D., Fernando, N., & Gunarathna, M. A. C. L. (2016). Skills developments of labourers to achieve the successful project delivery in the Sri Lankan construction industry. Civil and Environmental Research, 8(5), 86-97. Gamini, P. H. S., (2019, April 23). Public consultation on the introduction of standards for water fittings. Retrieved from: https://www.youtube.com/watch?v=u8ZdicruVSg. Gunawardena, N. D., & Jayawardane, A. K. W. (2001). The training needs of construction workers in Sri Lanka., Annual Transactions of IESL 2001:112-137. Halliday-Wynes, S., & Stanwick, J. (2011). Plumbing, sustainability and training. Adelaide, SA: NCVER. Indian Plumbing Association (IPA). (2021). Codes and Standards. retrieved from https://www.indianplumbing.org/Codes Jayalath, D. (2016), Major shortage of skilled workers in the domestic construction industry is India the answer. Retrieved from http://www.lankaweb.com Katsuyama, N. (2009). The economics of occupational licensing: Applying antitrust economics to distinguish between beneficial and anticompetitive professional licenses. S. Cal. Interdisc. LJ, 19, 565. Kleiner, M. M. (2000). Occupational licensing. journal of economic perspectives,14(4), 189-202. Kleiner, M. M. (2015). Reforming occupational licensing policies (The Hamilton Project discussion paper 2015-01). Retrieved from The Brookings Institute website: https://www. brookings. edu/wp-content/uploads/2016/06/THP_KleinerDiscPaper_final. pdf. Kleiner, M. M. (2017). The influence of occupational licensing and regulation. IZA World of Labor, (392). Retrieved from https://wol.iza.org/uploads/articles/392/pdfs/the- influence-of-occupational-licensing-and-regulation.pdf?v=1 94 Kleiner, M. M., Krueger, A., (2010) "The prevalence and effects of occupational licensing" National Bureau of Economic Research' Lobo, Y., & Wilkinson, S. (2006). The effects of occupational licensing on skills needs in the building industry: Evidence from New Zealand. Construction Economics and Building, 6(2), 55-63. Love, P. E., Davis, P. R., & Worrall, D. (2010). Occupational licensing of building trades: Case of Western Australia. Journal of Professional Issues in Engineering Education and Practice, 136(4), 215-223. Nunn, R. (2016) “Occupational Licensing and American Workers.” The Hamilton Project, Retrieved December 15,2022 from https://www.hamiltonproject.org/ papers /occupational_licensing_and_the_american_worker Occupational licensing. (2020, November 01). In Wikipedia. Retrieved November 15, 2020, from: https://en.wikipedia.org/wiki/Occupational_licensing Pape, T. E. (2008). Plumbing codes and water efficiency: What's a water utility to do? Journal‐American Water Works Association, 100(5), 101-103. PHCEid (n.d), HVAC, electrical, and plumbing licensing regulation 2020 Code Retrieved December 15, 2021 from https://www.phceid.org/the-ultimate-guide-to-state- plumbing-license-requirements/ Plumbing and Mechanical (n.d), Top 10 reasons why plumbing is so important Retrieved 15 December, 2021 from https://www.pmmag.com/articles/97077-top-10-reasons- why-plumbing-is-so-important Plumber Training center (n.d). How to become a plumber in Canada. Retrieved 6 July, 2022 from https://plumbertrainingcenter.com/how-to-become-a- plumber-in-canada Public Utility Board. (2017). PUB corporate brochure. Retrieved 10th November 2021 from: https://www.pub.gov.sg/Documents/PUBcorporatebrochure2017.pdf Public Utility Board (n.d). licensed plumbers. Retrieved November 25, 2021 from: https://www.pub.gov.sg/compliance/plumbingworks/licensedplumbers Public Utilities commission of Sri Lanka, (2018). Licensing of electricians. Retrieved November 18, 2021 from: R-TS-KR-15-Feb-2018.pdf 95 Public Utilities commission of Sri Lanka. (2014). regulatory manual. Retrieved February 10, 2022 from: https://www.pucsl.gov.lk/wp-content/uploads/2018/09/Regulatory-Manual- March-2013-Version-3.pdf PUCSL to establish licensing framework for electricians (2018, March 23). Daily News. Retrieved November 28, 2021 from: https://www.dailynews.lk. Rege, G., Riley, T., Mitchel-Slentz, B., Tibass, S., & Curnow, C. (2019). NCLS occupational licensing consortium case study reports. Washington, DC: American Institutes for Research. Retrieved from: https://www.air.org/system/files/NCSL-Case-Study-Report-Nov-2019- rev2.pdf Silva, G. A. S. K., Warnakulasuriya, B. N. F., & Arachchige, B. J. H. (2018). A review of the skill shortage challenge in construction industry in Sri Lanka. international journal of economics, business, and management research, 2(1), 75-89. Sri Lanka. Tertiary and Vocational Education Commission. (2011). Study on constraints faced by training providers in implementation of NVQ frame work Taylor, B. S. G., Goshal, T. (2006). Research methodology: A guide for The Qualitative Report, 8(4), 597-607. Tertiary and Vocational Education Commission of Sri Lanka. (n.d.) retrieved November 01, 2020, from http://www.tvec.lk Techo, Vincent. (2016). Research Methods-Quantitative, Qualitative, and Mixed methods. 10.13140/RG.2.1.1262.4886. The International Labour Organization (n.d). Apprenticeship Manual. Retrieved November 18, 2021, from https://www.ilo.org The Engineering Toolbox.(n.d.). plumbing codes. Retrieved October 15, 2021, from https://www.engineeringtoolbox.com/plumbing-codes-d_1100.html Thomas E. Pape. "Plumbing codes and water efficiency: What's a water utility to do?" , Journal - American Water Works Association, 2008 USA plumbing (n.d). How to get a Plumbing License. Retrieved December 10, 2021, from: https://www.usaplumbing.info/ 96 US Department of Labour (n.d). Apprenticeship. Retrieved November 15, 2021, from https://www.dol.gov/general/topic/training/apprenticeship Wang, H., Bedard, E., Prevost, M., Camper, A. K., Hill, V. R., & Pruden, A. (2017). Methodological approaches for monitoring opportunistic pathogens in premise plumbing: A review. Water research, 117, 68-86. Wikipedia.org. 2021. Plumbing code - Wikipedia. Retrieved December 13, 2021 from: https://en.wikipedia.org/wiki/Plumbing_code. World Health Organization.(n.d). Codes of practice for plumbing. Retrieved from: https://www.who.int/water_sanitation_health/hygiene/plumbing7.pdf World Health Organization.(n.d). Training and registration of plumbers. Retrieved from https://www.who.int/water_sanitation_health/hygiene/plumbing9.pdf World Plumbing Council. (2017). Four Pillars of Plumbing Program. https://www.worldplumbing.org/ World Health Organization, (2006). Guideline on health aspects of plumbing. Retrieved from: https://www.worldplumbing.org/publications World Plumbing Council. (2010). Environmental aspects of plumbing. Retrieved from:https://www.worldplumbing.org/wp- content/ uploads/ 2016 /11 /eap published version april 2010 final.pdf Wynes, S., & Stanwick, J. (2011). Plumbing, sustainability and training. Adelaide, SA: NCVER