318 SECRETARIAL PRACTICE (5) The foregoing provisions of this section apply to transac- tions wherever effected, but only to deeds and instruments executed after the commencement of this Act, except that, in the case of powers or appointments of an agent or officer, they apply whether the power was conferred or the appointment was made before or after the commencement of this Act or by this Act. (6) Notwithstanding anything contained in this section, any mode of execution or attestation authorised by law or by practice or by the statute, charter, memorandum or articles, deed of settlement or other instrument constituting the corporation or regulating the affairs thereof, shall (in additien to the modes authorised by this section) be as effectual as if this section had not been passed. NOTE :(— ‘corporation aggregate’ is composed of many persons acting on all solemn occasions by the medium of their common seal, including joint-stock companies; in con- tradistinction to a ‘corporation sole’ which is composed only of one person, such as a bishop or a beneficed clergyman, the Treasury Solicitor, or the Public Trustee.