Final answer:
Establishing a corporation requires the existence at the time of the will, intention to incorporate, and being described with certainty.
Step-by-step explanation:
The requirement for the existence at the time of the will, the intention to incorporate, and being described with certainty is for establishing a corporation.
A corporation is a legal entity that has the ability to sue and be sued, enter into contracts, file for bankruptcy, and raise revenue through borrowing or selling shares of its stock.