Upon the implementation of a mandatory recycling program pursuant to Section 21-142(e) of this Code, the Director may place the following restrictions on disposal at County landfill facilities: The Director may direct County landfill facilities to cease accepting loads of designated recyclable materials, or solid waste mixed with designated recyclable materials, including those which have been collected from multifamily rental facilities, single-family dwellings, condominiums, commercial establishments, or industrial facilities, in both incorporated and unincorporated areas of the County. The Director may direct County landfill facilities to cease accepting yard wastes upon the determination that a feasible, cost-effective alternative to landfilling this material exists. When determining the feasibility of banning yard wastes from landfills, the Director shall take into account the higher costs of collecting this material in an uncontaminated form. Any ban on landfill disposal imposed by the Director may be on a seasonal, temporary, or permanent basis by individual load, by geographical area, or otherwise as the Director deems appropriate in order to establish effective recycling programs.