Section 6
SEC. 6. The grantee, his successors or assigns, shall be liable to pay the same taxes on their real estate, buildings, and personal property, exclusive of this franchise, as other persons or corporations are now or hereafter may be required by law to pay. In addition, the grantee, his successors or assigns, shall pay to the Insular Treasurer each year, within ten days after the audit and approval of the accounts as prescribed in section five of this Act, two per centum of all gross receipts of the telephone, telegraph, or ' other electrical transmission business transacted under this franchise by the grantee, his successors or assigns, and the said two per centum shall be in lieu of all taxes on this franchise or earnings thereof.