Sec. 8-72. Operation of projects. Rentals. Tenant eligibility. Inspections. Semiannual statements. Penalty for false statement. Each developer or housing authority shall manage and operate its housing projects in an efficient manner so as to enable it to fix the rentals for dwelling accommodations at the lowest possible rates consistent with providing decent, safe and sanitary dwelling accommodations, and no housing authority or nonprofit corporation shall construct or operate any such project for profit. To this end an authority or a nonprofit corporation shall fix the rentals for dwelling in its projects at no higher rates than it finds to be necessary in order to produce revenues which, together with all other available money, revenues, income and receipts of the authority or nonprofit corporation from whatever sources derived, will be sufficient (a) to pay, as the same become due, the principal and interest on the bonds of the authority or nonprofit corporation; (b) to meet the cost of, and to provide for, maintaining and operating the projects, including the cost of any insurance, and the administrative expenses of the authority or nonprofit corporation; provided nothing in this section shall be construed as prohibiting any authority or nonprofit corporation from providing for variable rentals based on family income. In the operation or management of housing projects an authority or nonprofit corporation shall, at all times, rent or lease the dwelling accommodations therein at rentals within the financial reach of families of low income. The Commissioner of Housing may establish maximum income limits for admission and continued occupancy of tenants, provided such maximum income limits and all revisions thereof for housing projects operated pursuant to any contract