The Executive Committee shall provide a common seal for the Association. The seal shall be kept with the Secretary General and shall never be affixed to any document except by the authority of the Executive Committee previously given and the Chairman/Vice -Chairman/Chief Executive for the time being and one other Member of the Executive Committee or the Secretary General shall sign every instrument to which the seal is affixed, provided nevertheless that any instrument bearing the seal of the Association and issued for a valuable consideration shall be binding on the Association notwithstanding any irregularity concerning the authority of the Executive Committee to issue the same