Issuance of Administrative Rules and Regulations
The fundamental rule in administrative law is that, to be valid, administrative rules and regulations must be issued by authority of law and must not contravene the provisions of the Constitution. The rule-making power of an administrative agency may not be used to abridge the authority given to it by Congress or by the Constitution. Nor can it be used to enlarge the power of the administrative agency beyond the scope intended. Constitutional and statutory provisions control with respect to what rules and regulations may be promulgated by administrative agencies and the scope of their regulations. (DAR v. Uy, G.R. No. 169277, February 9, 2007, Callejo, J).