(a) Persons entitled to a patent under the Act of 1954 must, within 30 days after request therefor, pay, under the same terms and conditions, the same price per acre as was paid for the land included in their original patent.

(b) Persons entitled to a patent under the Act of 1925, within 30 days after request therefor, must pay the appraised price of the lands, which price will be the value of the lands as of the date of appraisal, exclusive of any increased value resulting from the development or improvement of the lands for agricultural purposes by the applicant or his predecessors in interest but inclusive of the stumpage value of any timber cut or removed by them.