Oil and gas lease

I’m working on a lease. Is there any type of “standard” in filling this part out?

(c) Maximum Sizes of Production Units. Notwithstanding any density rules applicable to any well, however, no Production Unit assigned to any well shall exceed the following sizes:

(i) If the well is classified as an oil well under the Rules and Regulations of the Railroad Commission then in effect, the maximum size of the Production Unit shall be __________ acres [if the well is producing in whole or in part from formations less than __________________ feet beneath the surface, and ___________ acres if the well is producing from formations located wholly below ___________ feet beneath the surface].

(ii) If the well is classified as a gas well under the Rules and Regulations of the Railroad Commission of Texas then in effect, the maximum size of the Production Unit shall be __________ acres [if the well is producing in whole or in part from formations less than __________________ feet beneath the surface, and ___________ acres if the well is producing from formations located wholly below ___________ feet beneath the surface].