Not less than 30 percent nor more than 40 percent of the units financed by the agency during each fiscal year for very low-income households shall be designed specifically for occupancy by elderly persons. The agency shall in each fiscal year, finance at least that number of rental units designed for occupancy and accessibility by persons with orthopedic disabilities necessary to make such units equal to the same percentage relationship to the total number of rental units as such persons comprise when compared to the total population of the state. The percentage shall only, however, relate to those persons qualified by income and the percentage relationship shall be verified
according to submarket areas within the state.