|There are three ways; by (1) requesting a Vanity call sign by listing assignable call signs in order of preference, (2) by reclaiming a previously held club call sign or (3.) "in memoriam." While an individual Amateur Radio operator may hold only one primary Amateur Radio station license and Vanity station call sign, there is no limit to the number of club station licenses or Vanity call signs that can be held by the same club -- but you must be able to justify why you need more than one club call sign.
The name, address and call sign indicated in the online forms first section MUST be that of the club. It must match the FCC;s licensing record for the club. The telephone number, and e-mail address, however, should be that of the trustee. The signature on the online form is that of the trustee. Type "Club" in the line that asks for the Social Security number (since club's do not have an SSN.)
The trustee's operator class determines the "Group" of the call sign. For example, you must be an Amateur Extra Class operator to apply for a Group A call sign. (After you have obtained a Group A vanity call sign for your club station, you may replace the Extra Class trustee with a person who holds another class of operator license without losing
your Group A Vanity call sign.)
IMPORTANT In the comments section, you must list the name, address, call sign and telephone number of an officer of your club who has approved the call sign change.
The club call sign you select must have been unassigned for at least two years if you are simply requesting a Vanity call sign for your club. The two year rule does not apply if you are reclaiming a previously held call sign for which you were the license trustee or are applying for the "memorial" call sign of a previous club member, now deceased. A club call sign request by a former club call sign holder may be from any Group.