What is described as a Condition Precedent in property law?

In property law, a Condition Precedent refers to a legal requirement that must be fulfilled before certain rights or interests take effect. When it is stated that an act must occur before title vests, this means that for a property title to be transferred or acknowledged legally, a specific event or action must happen first. For instance, a typical example could be a purchase agreement that stipulates the buyer must secure financing before the title to the property is formally conveyed. This condition ensures that the necessary steps are completed to legally establish ownership and clarify the parties' rights.

The other options, while related to real estate and property rights, do not fit the definition of a Condition Precedent. An act that must be stopped to maintain title suggests a different principle concerning the protection of property rights rather than the conditions for title transfer. Ownership through adverse possession is a concept based on continuous possession of property without the owner's permission rather than a requirement prior to vesting title. Lastly, restrictions on property use pertain to how the property can be utilized, but they do not dictate whether title will vest based on a precondition. Thus, option A accurately encapsulates the meaning of a Condition Precedent in the context of property law.