As to geographic areas which, after March 29, 1973, are included within the initial limits of a wholly new municipality, the rights and restrictions applying to electric suppliers shall be as follows:

(1) Any portion of such geographic area then already assigned to an electric supplier shall continue to be so assigned until and unless reassigned by the commission to another electric supplier pursuant to paragraph (1) of subsection (d) of Code Section 46-3-8; and

(2) Any portion of such geographic area which is then unassigned shall continue to be so unassigned until and unless it is assigned by the commission, taking into account the recommendation, if any, of the municipality itself, to an electric supplier pursuant to paragraph (2) of subsection (d) of Code Section 46-3-8.