For the purpose of efficient drainage of
any premises the Commissioner may by notice in writing––
(a) require any courtyard, alley or passage between two or more buildings to be paved by the owner or owners of such buildings with such materials and in such a manner as may be approved by the Commissioner ; and
(b) require such paving to be kept in proper repair.
(a) require any courtyard, alley or passage between two or more buildings to be paved by the owner or owners of such buildings with such materials and in such a manner as may be approved by the Commissioner ; and
(b) require such paving to be kept in proper repair.