The citation referring to reasonable access is 105 CMR 410.810. The interpretation indicated above, is the Department's interpretation of its own regulation. The Department has the authority to interpret its own regulations.
Courts regularly defer to the agency's interpretation provided that it is rational.
Given the construction of the regulation, reasonable access cannot mean that the tenant must give access whenever any repair person is available to work. If this were the intent, the regulation would read that the tenant shall provide access at any time it is requested. It does not. It states upon reasonable notice, the tenant shall provide reasonable access, if possible by appointment. The term reasonable access indicates some limitation on the period of time when a tenant is required to permit workers to make repairs.