4. Every contract must be evidenced in writing and is subject to the rules governing the making of contracts that must be evidenced in writing prescribed under sections 24 to 28 and 30 to 33 of the Consumer Protection Act (chapter P-40.1), adapted as required. In no case may a prearranged funeral services contract and a prepurchased sepulture contract be evidenced in the same writing.
Every contract modification is subject to the rules set out in the preceding paragraphs.