The Commissioner must provide for the following classes of licenses:Class A Licenses, for:dogs and cats that have been altered; and dogs and cats that have not been altered, but for which a licensed veterinarian certifies in writing that, because of age or bad health, the animal should not be altered. Class B Licenses, for disability service animals, whether or not altered, on the applicant’s submission of an affidavit claiming the person has a disability. Class C Licenses, for the lifetime of dogs and cats that are altered and microchiped. Class D Licenses, for all other dogs and cats. The license fee for each class is as set under <cite data-path="|health|§10-106">§ 10-106 of this title</cite>. For owners 65 years old or older, the annual fee for each license class is 50% of the annual fee otherwise set for that class. Ord. 00-024 Ord. 02-323 Ord. 11-573