139. The licensee, with the authorization of the Minister, may abandon his right in all or part of the territory for which the licence was issued provided
(1) he applies therefor in writing;
(2) the residual area, in the case of partial abandonment, is comprised within a single perimeter;
(3) he has complied with the other provisions of this Act and the regulations.
Partial abandonment does not reduce the work that the licensee is required to perform under section 137 during the current term of his licence.