The law requires that in order for minors to void contracts entered into when they were minors, they must cancel within a reasonable time after turning 18. Does it describe the contract?It's important to follow a number of rules: The first rule is that it's never 'versus'. Although there's a 'v' you don't say "versus". Why we enforce promise. Contract law recognizes certain defenses to enforcing a contract. If you qualify for one of these defenses, you don't have to fulfill your end of the contract. 2. In common law, there are 3 basic essentials to the creation of a contract: (i) agreement; (ii) contractual intention; and (iii) consideration. 3. We hope that this Beginner's Guide helps you to feel more grounded and confident in the area of contract law. Fill the gaps in the text with a word from the box below.