Old original Texas oil lease questions

Thanks for the reply, (it’s a little lengthy) but below is pretty much what the 2003 lease amendment to the 1976 lease stated:

WHEREAS Lessor did execute 1976 lease

NOW, THEREFORE, the undersigned owns an interest in and to all or a portion of the land in said lease, said land further described

WHEREAS, said lease and all rights and privileges thereunder are now owned by “Company 123” and

NOW, THEREFORE, it is expressly agreed that if at any time, either before or after the formation of a pooled unit thereunder, should the RRC of Texas permit, prescribe, allow or require larger units for production from a horizontal well or wells, than is allowed by said lease, then Lessee is authorized to form new units, and/or revise existing units to contain sufficient acreage to either obtain the maximum allowable for a horizontal well or to increase such acreage to form units of the size permitted or allowed by law for such horizontal well. Furthermore for the purpose of forming a new unit as described in Exhibit A attached, Lessee shall have unencumbered right to pool within the boundaries of said new or revised unit, all or any portion thereof the acreage covered hereby regardless if said acreage is currently within the boundaries or outside the boundaries of an existing unit.

NOW, THEREFORE, in consideration of the premises cited herein and other valuable considerations all cash to us in hand paid by Company 123, the receipt of which is hereby acknowledged, we the said “Larry Graff”, Lessor (whether one or more) do hereby adopt, ratify, and confirm said lease in all of its terms and provisions (as amended herein) as well as any land and premises unto the said Company 123, subject to and in accordance with all the terms and provisions of said lease (as amended) as fully and completely as if we had originally been named Lessor in said lease, and had executed, acknowledged and delivered same in our own proper person. And we do hereby agree and declare that said lease and all of its terms and provisions is binding on us and each of us and is a valid subsisting oil, gas, and mineral lease. Except as expressly amended herein, all other terms and provisions of the lease shall remain as originally written.

The undersigned parties hereto are each the owner of a mineral, royalty, or payment out of production interest subject to the terms of said lease. For the consideration hereinabove recited, the parties hereto owning a mineral interest in said land do hereby grant, lease and let unto Company 123 that land described in said lease and any amendments thereto for the purposes set out in said lease in all things in accordance with the terms and provisions of said lease as same is hereby amended. The parties hereto owning a royalty or payment out of production interest in said land, for said consideration do hereby ratify and agree that said lease as amended hereby is binding upon each of them and that their interest may be pooled under the provisions hereof.