57 13- Exempt investment companies, public and private, national and foreign, in the field of housing from taxes on profits for a period of five years to be calculated from the starting date of implementation and three years after sale, whichever is shorter, with the conditional undertaking to employ national manpower. 14- Conserve the existing housing stock and intensify maintenance and renovation works and amelioration programs as well as develop residential buildings and complexes and their utilities and services to upgrade the housing environment. 15- Devise programs and plans for the operationalization of infrastructure in areas of water, sanitary drainage, roads, electricity, gas, communication and other civil services throughout the Jamhirya while developing existing facilities and services and sustaining periodic maintenance of enterprises already implemented. 16- Give incentives to foreign investors and the private sector and activate their role in implementing projects of sea water desalination and wastewater treatment stations on the basis of construction, operation and ownership contracts. 17- Supply cities and compounds built along the banks of the great industrial river with its water and implement new integrated water desalination station projects with due consideration to quantitative and qualitative needs and integration with other water resources. 18- Increase quantities of potable water and purify it in conformity with approved standards and specifications. Expand the process of granting real estate loans by establishing financing funds and other specialized real estate or housing banks and providing adequate capital, while taking into account the financial potential of citizens on determining premiums to pay off loans alongside abidance by approved building terms and plans. 19- Allow commercial and specialized banks to offer real estate loans to companies undertaking to provide housing to its candidate owners (company housing), and extend credit facilities such as medium and short term loans to financing companies investing in the field of housing