Executive Rule No. 3 details the mandatory procedures for an Incorporated Body to obtain, use, and renew a tax card. It mandates submitting a specific application form, after which the body is classified based on its activity and registration details. The tax card, issued within one week, must contain specific information such as the entity's name, activity, and tax declaration date. The rule requires annual renewal upon tax declaration submission and obligates the presentation of a valid card for all business transactions. It prohibits public and private entities from dealing with any Incorporated Body holding an invalid tax card.