(2) Where the Rent Administrator finds there have been excessive and prolonged violations of the housing regulations affecting the health, safety, and security of the tenants or the habitability of the housing accommodation in which the tenants reside and that the housing provider has failed to correct the violations, the Rent Administrator may roll back the rents for the affected rental units to an amount which shall not be less than the September 1, 1983, base rent for the rental units until the violations have been abated.