An acceleration clause in a mortgage or trust deed stipulates that the entire debt is due immediately, if the borrower defaults under the terms of the contract. Types of clauses: 1.Independent Clause - expresses a complete thought and has a subject and verb. These four primary clauses are an acceleration clause, a dueonsale clause, a prepayment penalty clause and a release clause. What are the essential elements of a Real Estate Contract? In a similar contract dispute, LeBlanc v. Sani-John Corporation, the. A detailed description of the property bought or sold is essential in a real estate contract. All legislative Powers herein granted shall be vested in a Congress of the United States, which shall consist of a Senate and House of Representatives. Some important contingency clauses should include financing, home inspections, closing costs, and the closing date, among others.