Simplify the following text for a Grade 10 native English-speaking person.
Original: Legislation is usually proposed by a member of the legislature ( e.g. a member of Congress or Parliament ) , or by the executive , whereupon it is debated by members of the legislature and is often amended before passage .
Simplified: Legislation is usually proposed by a member of the legislature ( e.g. a member of Congress or Parliament ) , or by the executive , then it is debated by members of the legislature and is often amended .