Which statement best describes a card$-$check provision?

It is an arrangement that allows the employer, on behalf of the union, to automatically deduct union dues from the employees' paychecks.

It is an agreement that if a certain percentage of employees sign an authorization card, the employer will recognize their union representation.

It is an alternative form of union membership in which members receive discounts on insurance and credit cards rather than representation in collective bargaining.

It is a formal and binding pledge by the employer not to oppose organizing efforts elsewhere in the company.

It is a formal and binding pledge by at least $51$ percent of employees to not unionize.