(

a) The structures in all of the following categories shall be exempt from this article:

(1) Low-income housing. For purposes of this paragraph, “low-income housing” means a residential building financed with low-income housing tax credits, tax-exempt mortgage revenue bonds, general obligation bonds, or local, state, or federal loans or grants, for which the rents of the occupants in lower income households, as defined in

Section 50079.5 of the Health and Safety Code, do not exceed rents prescribed by deed restrictions or regulatory agreements pursuant to the terms of the financing or financial assistance, and for which not less than percent of the dwelling units within the building are designated for occupancy by lower income households, as defined in

Section 50079.5 of the Health and Safety Code.

(2) Housing at a place of education, as defined in

Section of the California Building Standards Code (Title of the California Code of Regulations).

(3) Long-term health care facilities, as defined in

Section of the Health and Safety Code.

(4) Time-share property, as defined in subdivision (aa) of

Section of the Business and Professions Code.

(5) Residential care facilities for the elderly, as defined in

Section 1569.2 of the Health and Safety Code. (

b) A submeter used to measure water supplied to an individual residential unit that is required pursuant to this

chapter shall be of a type approved pursuant to

Section 12500.5 of the Business and Professions Code, and shall be installed and operated in compliance with regulations established pursuant to

Section of the Business and Professions Code.