(a) This division does not apply to any development project that meets the requirements of subdivision (b), and meets either of the following criteria:

1. (1) Consists of the construction, conversion, or use of residential housing for agricultural employees, and meets all of the following criteria:

   1. (A) Is affordable to lower income households, as defined in Section 50079.5 of the Health and Safety Code.
   2. (B) Lacks public financial assistance.
   3. (C) The developer of the development project provides sufficient legal commitments to the appropriate local agency to ensure the continued availability and use of the housing units for lower income households for a period of at least 15 years.

2. (2) Consists of the construction, conversion, or use of residential housing for agricultural employees and meets all of the following criteria:

   1. (A) Is housing for very low, low-, or moderate-income households as defined in paragraph (2) of subdivision (h) of Section 65589.5 of the Government Code.
   2. (B) Public financial assistance exists for the development project.
   3. (C) The developer of the development project provides sufficient legal commitments to the appropriate local agency to ensure the continued availability and use of the housing units for low- and moderate-income households for a period of at least 15 years.

(b)

1. (1) If the development project is proposed within incorporated city limits or within a census defined place with a minimum population density of at least 5,000 persons per square mile, it is located on a project site that is adjacent, on at least two sides, to land that has been developed, and consists of not more than 45 units, or is housing for a total of 45 or fewer agricultural employees if the housing consists of dormitories, barracks, or other group living facilities.
2. (2) If the development project is located on a project site zoned for general agricultural use, and consists of not more than 20 units, or is housing for a total of 20 or fewer agricultural employees if the housing consists of dormitories, barracks, or other group living facilities.
3. (3) The project satisfies the criteria in Section 21159.21.
4. (4) The development project is not more than five acres in area, except that a project site located in an area with a population density of at least 1,000 persons per square mile shall not be more than two acres in area.

(c) Notwithstanding subdivision (a), if a project satisfies the criteria described in subdivisions (a) and (b), but does not satisfy the criteria described in paragraph (1) of subdivision (b), this division does not apply to the project if the project meets all of the following criteria:

1. (1) Is located within either an incorporated city or a census-defined place.
2. (2) The population density of the incorporated city or census-defined place has a population density of at least 1,000 persons per square mile.
3. (3) The project site is adjacent on at least two sides to land that has been developed and the project consists of not more than 45 units, or the project consist of dormitories, barracks, or other group housing facilities for a total of 45 or fewer agricultural employees.

(d) Notwithstanding subdivision (c), this division shall apply to a project that meets the criteria described in subdivision (c) if a public agency that is carrying out or approving the project determines that there is a reasonable possibility that the project, if completed, would have a significant effect on the environment due to unusual circumstances or that the cumulative impacts of successive projects of the same type in the same area, over time, would be significant.

For the purposes of this section, “agricultural employee” has the same meaning as defined by subdivision (b) of Section 1140.4 of the Labor Code.