Section 18. Repealing Clause. — Pertinent provisions of Batas Pambansa Blg. 232 or the "Education Act of 1982", Republic Act No. 9155 or the "Governance of Basic Education Act of 2001", Republic Act No. 9258, Republic Act No. 7836, and all other laws, decrees, executive orders and rules and regulations contrary to or inconsistent with the provisions of this Act are hereby repealed or modified accordingly.