Simplify the following text for a Grade 10 native English-speaking person.
Original: Alongside the text of the Constitution , and Letters Patent issued by the Crown , conventions are an important aspect of the Constitution , which have evolved over the decades and define how various constitutional mechanisms operate in practice .
Simplified: As well as the written Constitution , and Letters Patent issued by the Crown , conventions are an important part of the Constitution . These have developed over the years and define how various constitutional mechanisms work in practice .