Question

Marvin, a tenant for several years, received a notice from his landlord informing him of an increase in rent starting the following month. Faced with financial difficulties, Marvin became worried about the additional expense and sought legal advice.

Upon consultation, Marvin's lawyer informed him about his right to challenge the rent increase, but also discussed the possibility of waiving that right. The lawyer explained that by waiving his right to challenge the rent increase, Marvin could potentially negotiate a lower rental rate or other concessions with the landlord.

In light of the lawyer's advice, Marvin drafted a written document stating that he voluntarily waives his right to challenge the rent increase and that he agrees to pay the new rental rate. He signed the document and handed it to his landlord.

Considering the given scenario, discuss the following:

1. Is Marvin's waiver of his right to challenge the rent increase valid and enforceable? Explain.
2. What are the requirements for a valid waiver of rights under Article 6 of the Civil Code?