In determining whether a housing development will have an impact on the ability of the city, county, or city and county to properly adopt and implement an adequate housing element, the court shall consider all relevant factors. There is a conclusive presumption that any housing development, 25 percent of which units are affordable to persons and families of low or moderate income, as defined by Section 50093 of the Health and Safety Code, can be developed without having an impact on the ability of the city, county, or city and county to properly adopt and implement an adequate housing element, except where the approval of a housing development may prevent the city, county, or city and county from complying with the final judgment of the court.