(a)      To promote the creation of housing that is affordable to persons and families who have low or moderate incomes, a local legislative body that exercises authority granted by this article may enact ordinances or laws that:

            (1)      Impose inclusionary zoning and award density bonuses to create affordable housing units; and

            (2)      Impose restrictions on the use, cost, and resale of housing that is created under this subtitle to ensure that the purposes of this subtitle are carried out.

      (b)      The authority granted under this subtitle is in addition to any other zoning and planning powers.