14. Subject to such conditions and limitations as may be prescribed, a Certificate-officer may order execution of a certificate- (a) by attachment and sale, or by sale (without previous attachment), of any property, or (b) by attachment of any decree, or (c) by arresting the Certificate-debtor and detaining him in the civil prison, or (d) by any two or all of the methods mentioned in clauses (a), (b) and (c). Explanation to clause (d).-The Certificate-officer may, in his discretion, refuse execution at the same time against the person and property of the certificate-debtor.