Section 14 - Time of performing conditions of grant1. The commissioner of general services may, unless otherwise provided, fix a reasonable time, not less than one year, for the performance of conditions by the grantees of lands, including lands under water, directed to be granted on the performance of conditions. If such conditions are not performed within the time limited, the persons entitled to any benefit under such grant shall forfeit all right to and title in the premises. If the commissioner, after having caused an inspection to be made of the lands granted, determines that the conditions contained in the letters-patent have been complied with, he may issue a certificate to that effect. If complete compliance has not been had, the commissioner, in his discretion, may make an order to the effect that compliance had been had with the conditions in such definitely described portion of lands granted as have been improved. Such order shall be conclusive evidence of the performance of the conditions contained in such letters-patent to the extent stated in such order and as to lands described therein. When the time within which any condition contained in any grant of land is fixed by the terms of the grant, the commissioner may, for good cause shown before the expiration of such time, extend the time within which such condition is to be performed, not exceeding three years.2. The commissioner may, in his discretion, upon application of the grantee or his successor in interest, by order, alter, amend or cancel any condition or conditions contained in letters-patent for land, including lands under water, if satisfied by the reason or proof submitted that such alteration, amendment or cancellation of condition or conditions is just and is not detrimental to the interests of the state.