(a) When the commission has ascertained, located and determined said line, if it appears to it that the existing county line, from any cause whatever, has become inconvenient for any purpose, or improper, difficult to ascertain or not related to the natural or other land marks, the commission shall report these facts or any of them to the court of quarter sessions having appointed the commission, with a recommendation that a new county line be established in whole or in part.

(b) Thereupon, if said court shall be of opinion that it is to the interest and advantage of the respective counties that a new county line be established, they may direct said commission to fix and determine a new county line and to mark the same with suitable monuments of a permanent character.

(c) Notice shall be given to the counties interested and to the owners of all lands which will be affected by the proposed change of the time when the recommendation of the commission for a new county line will be considered by the court.