Disposition of substances other than petroleum.
Article 100
ART. 100. Disposition of substances other than petroleum.—In the event that substances other than petroleum as denned in article two, should occur naturally and be produced with petroleum, the exploitation concessionaire may separate such other substances at his own expense; Provided, That in the event that any such other substances be sold, the value thereof shall be taken into account in fixing the value of petroleum for the purpose of liquidating royalty in cash as provided in article sixty-eight: And provided, further, That if the Secretary of Agriculture and Natural Resources elects to receive; such other substances in kind the concessionaire shall, upon request of the Secretary of Agriculture and Natural Resources, separate and deliver to the Government such substances through the facilities of the concessionaire and at the expense of the Government.