28 CFR Part 35 Title II Notice of Proposed Rulemaking (NPRM) (published 2008)

(h) Fees or surcharges.  A public entity shall not ask or require an individual with a disability to post a deposit, pay a fee or surcharge, or comply with other requirements not generally applicable to other citizens as a condition of permitting a service animal to accompany its handler in a public entity's facility, even if people accompanied by pets are required to do so.  If a public entity normally charges its citizens for damage that they cause, a citizen with a disability may be charged for damage caused by his or her service animal.