Authorizing, under specified circumstances, a register of wills to extend the time periods for filing a final report and for making distribution of an estate in a modified administration of the estate for an additional specified period on the filing of a specified request; requiring a request for the extension to be signed by the personal representative and consented to by each interested person; requiring the request to be delivered to the register of wills no later than a specified date; applying the Act prospectively; etc.