Proof of membership in a professional association or order For each professional association or order of which you, your current spouse and, where applicable, the person who was your spouse during the period covered by the contested decision are or were a member, you must provide a letter for the professional association or order containing the following information: The date membership in the professional association or order began and, if applicable, the date membership endedConfirmation of whether or not one or the other of those associations or orders offers a group insurance plan providing basic prescription drug coverage. If such a plan is offered, the document must specify:The reason why you do not qualifyorThe duration of the waiting period before being entitled to the planThe date you became eligible and the date you joined the planThe type of coverage chosen (individual, single-parent or family)The coverage end date, if applicable, and the reason the coverage ended