"SECTION 172. Detention of Package Containing Taxable Articles. - Any revenue officer may detain any package containing or supposed to contain articles subject to excise tax when he has good reason to believe that the lawful tax has not been paid or that the package has been or is being removed in violation of law, and every such package shall be held by such officer in a safe place until it shall be determined whether the property so detained is liable by law to be proceeded against for forfeiture; but such summary detention shall not continue in any case longer than seven (7) days without due process of law or intervention of the officer to whom such detention is to be reported.

"TITLE VII - DOCUMENTARY STAMP TAX

"SECTION 173. Stamp Taxes Upon Documents, Loan Agreements, Instruments and Papers. - Upon documents, instruments, loan agreements and papers, and upon acceptances, assignments, sales and transfers of the obligation, right or property incident thereto, there shall be levied, collected and paid for, and in respect of the transaction so had or accomplished, the corresponding documentary stamp taxes prescribed in the following Sections of this Title, by the person making, signing, issuing, accepting, or transferring the same wherever the document is made, signed, issued, accepted or transferred when the obligation or right arises from Philippine sources or the property is situated in the Philippines, and at the same time such act is done or transaction had: Provided, That whenever one party to the taxable document enjoys exemption from the tax herein imposed, the other party thereto who is not exempt shall be the one directly liable for the tax.