Civil Code of the Philippines: Art. 7

 Art. 7. Laws are repealed only by subsequent ones, and their violation or
non-observance shall not be excused by disuse, or custom or practice to the

When the courts declared a law to be inconsistent with the Constitution,
the former shall be void and the latter shall govern.
Administrative or executive acts, orders and regulations shall be valid
only when they are not contrary to the laws or the Constitution.

Article 7 is obvious because time moves forward.

Only subsequent laws can repeal prior laws either through:
1. A repealing clause
2. Incompatibility of the subsequent and prior laws
 The violation of a law is not justified even if:
1. No one follows the law (i.e., nonpayment of taxes)
2. There is a custom to the contrary

The 2nd par. of Article 7 is judicial review in statutory form.