(a) For the purposes of this section, the following words shall, unless the context clearly requires otherwise, have the following meanings:

''Customer'', an individual who is lawfully on the premises of a retail establishment.

''Eligible medical condition'', Crohn's disease, ulcerative colitis or any other medical condition that requires immediate access to a restroom facility.

''Retail establishment'', any business or place where members of the public have access as invitees or licensees.

(b) A retail establishment that has a restroom facility for its employees shall allow a customer to use that facility during normal business hours if the following conditions are met:

1. (1) the customer requesting the use of the employee restroom facility suffers from an eligible medical condition or uses an ostomy device, provided that the existence of the condition or device is documented in writing by the customer's physician;
2. (2) three or more employees of the retail establishment are working at the time the customer requests to use the employee restroom facility;
3. (3) the retail establishment does not normally make a restroom available to the public;
4. (4) the employee restroom facility is not located in an area where providing access would create an obvious health or safety risk to the customer or an obvious security risk to the establishment; and
5. (5) a public restroom is not immediately accessible to the customer.