Question

In 2002, the Philippine government enacted a law imposing a strict ban on the use of plastic bags in all commercial establishments. The law aimed to reduce environmental pollution and encourage the use of more sustainable alternatives. However, in 2021, a new law was passed that repealed the previous ban on plastic bags and allowed their use once again. This new law argued that plastic bags have become more environmentally friendly and can be recycled effectively.

As a concerned citizen, you are aware of the importance of environmental conservation and the detrimental impact of plastic pollution. You strongly believe in the need for stricter regulations on plastic usage. In light of the repeal of the plastic bag ban, you decide to challenge the constitutionality of the new law.

Discuss the possible arguments you can raise in your challenge based on the principle of repeal of laws under Article 7 of the Civil Code. Identify the key elements and requirements for the valid repeal of laws and explain how they apply in this case.