for grants made to assist rental housing, at least 50 percent of the units must be occupied by or made available to families with incomes at or below 50 percent of the area median income level and the remaining units shall be occupied or made available to families with incomes at or below 80 percent of the area median income level, and in all cases the landlord shall give priority in renting units assisted under this section, for not less than 3 years following the completion of lead abatement activities, to families with a child under the age of six years, except that buildings with five or more units may have 20 percent of the units occupied by families with incomes above 80 percent of area median income level;

for grants made to assist housing owned by owner-occupants, all units assisted with grants under this section shall be the principal residence of families with income at or below 80 percent of the area median income level, and not less than 90 percent of the units assisted with grants under this section shall be occupied by a child under the age of six years or shall be units where a child under the age of six years spends a significant amount of time visiting; and

notwithstanding paragraphs (1) and (2), Round II grantees who receive assistance under this section may use such assistance for priority housing.