(a)      In establishing the upper income limits for a family of limited income, the Secretary shall consider factors including:

            (1)      the income of the family available for housing;

            (2)      the size of the family;

            (3)      the cost and condition of available housing;

            (4)      the ability of the family to compete in the private housing market; and

            (5)      standards and definitions established for federal housing programs.

      (b)      The limits established under subsection (a) of this section may vary for different:

            (1)      types of housing;

            (2)      programs of the Administration; and

            (3)      areas of the State.

      (c)      A limit established under subsection (a) of this section may be supplemented for a particular project.