(3) In the case of a rent increase included as part of the rent charged or base rent for a capital improvement after October 19, 1989, the rent increase is temporary and is abated as to each tenant upon recovery of all costs of the capital improvement, including interest and service charges. The rent increase shall not be calculated as part of either the base rent or rent charged of a tenant when determining the amount of rent charged. When the housing provider has recovered all costs, including interest and service charges, the housing provider shall recompute and adjust the rent charged to reflect the abatement of the capital improvement rent increase.