A. If joint or correlated legislative action is required, it is contemplated in this Subpart that such joint or correlated legislative action will be taken within a reasonable time after the submission of such ordinances or other measures to the town council or the police jury by the commission.
B. If such legislative action is not taken by either the town council or the police jury, nothing in this Subpart shall be construed to prohibit, prevent, or impair the other from taking such action unilaterally with respect to the territory within its lawful jurisdiction; in such case either the town council or police jury, as the case may be, that has failed to take such legislative action shall forfeit to the other all rights and privileges with respect to joint action, such as appointment of members of the board of adjustment, and such rights and privileges shall remain forfeited until such time as the joint or correlated action contemplated is taken.