Regulation 25—Examination as to Substance.(1) Applications for patents relating to technical fields shall be the subject of an examination as to substance subject to section 20 of the Law.(2)  There shall be the authority designated in accordance with section 20 (3) of the Law.(3)  The notification and invitation under section 20 (7) of the Law shall be made on Form No. 9 in the Second Schedule and may be made several times, if necessary.(4)  The time allowed to submit observations and any amendments pursuant to section 20 (7) of the Law shall not be less than two and not more than six months from the date of the invitation to do so.(5)  The notification under section 20 (8) of the Law that the grant of the patent is refused shall be made on Form 9 in the Second Schedule stating the reasons and attaching a copy of the search and examination report upon which the decision is based.(6)  The Registrar shall notify the applicant, on Form No. 10 in the Second Schedule of the decision to grant a patent, requesting the applicant to pay the grant and publication fee within three months from the date of the notification.(7)  The Registrar shall, whenever possible, reach a final decision on the application not later than two years after the start of the examination as to substance.