If you now have an amateur radio license, and you were also licensed as a ham 25 years or more ago, you are eligible to join QCWA. It is not necessary that you have been continuously licensed during the twenty-five year period. If you are not absolutely sure of when you were first licensed, and do not have a copy of that license, ask HQ for help. We have nearly all of the past years' Callbooks, and can check to verify the year when you were first listed.
When you join QCWA, you choose an initial term of membership (one year, two years, three years, or lifetime) and prepay dues accordingly. Thereafter, you will be notified by Headquarters when it's time to renew.