Notwithstanding that no provision or insufficient provision has been made under section 46 for the adaptation of a law made before the appointed day, any court, tribunal or authority required or empowered to enforce such law may, for the purpose of facilitating its application in relation to the State of Arunachal Pradesh, construe the law in such manner not affecting the substance as may be necessary or proper in regard to the matter before the court, tribunal or authority, as the case may be.