(d) A dwelling unit shall become eligible for the imposition on the tenant of a charge for water usage only upon the commencement of a new tenancy in such dwelling unit and only if: (1) the dwelling unit is being occupied for the first time; or (2) the previous tenant vacated the dwelling unit voluntarily, or was evicted from the dwelling unit for nonpayment of rent or for breach of lease or noncompliance with a rental agreement for the dwelling unit; provided, however, that a dwelling unit shall not be deemed eligible for submetering if the new tenant relocated involuntarily from another dwelling unit in the same building or building complex; and provided further, that once a tenant of a dwelling unit has been charged for the use of water in accordance with this section, such dwelling unit shall remain eligible for the imposition of a charge for the use of water in all subsequent tenancies; and provided further, that a licensed plumber employed by or under contract with the landlord may perform any work in a dwelling unit as is required by this section to allow for the imposition on a tenant of a charge for the use of water, even if such unit is occupied by a tenant upon whom a charge for the use of water cannot be imposed.