Sec. 5. BIDDING. All bids shall be directed to the said Board in care of the General Land Office of the State of Texas, and shall be retained by the Commissioner of the General Land Office, until the day designated for the opening of bids, and upon that day the said Board, or a majority of its members, shall open said bids and shall list and file and register all bids and money received. A separate bid shall be made for each whole survey or subdivision thereof. No bid shall be accepted which offers a royalty of less than one-eighth (1/8th) of the gross production of oil and/or gas in the land bid upon, and this minimum royalty may be increased at the discretion of the Board, all members concurring, before the promulgation of the advertisement of the land. Every bid shall carry the obligation to pay an amount not less than One Dollar ($1) per acre for delay in drilling, such amount to be fixed by the Board in advance of the advertisement, and which shall be paid every year for five (5) years, unless in the meantime production in paying quantities is had upon the land.