Unfortunately, any change in enforcement must come from legislation enacted to give management of the HOAs the ability to do anything more than they currently are. I've had multiple discussions with management at Newport Coast regarding this issue. The standard response from MVC corporate is:
"Our corporate policy is consistent across all Vacation Club properties. Our organization has very clear standards and policies in place with respect to pets and service animals. All Marriott Vacation Club resorts prohibit pets on property. If resort management becomes aware that a guest has a pet staying in their villa, and it is not a service animal, the resort will charge the guest a cleaning recovery fee and request that the animal be housed in a nearby boarding facility at the guest’s expense. Individuals with a disability who arrives with a service animal will be granted access to all areas of the resort (including lobby, villa, food and beverage outlets, activities center, fitness center, pool areas, etc.).
If it is not readily apparent that the animal is a service animal, our Associate may ask the disabled guest the following two questions: Is your animal required because of a disability? What work or task is your animal trained to perform? While we do everything to ensure the ADA guidelines regarding service animals is enforced, if one of our guests affirm they have a service animal, we cannot remove the pet from the property. Because guests do not always advise us they have a pet or service animal on property, if you notice a guest with a pet during a stay, please share your concerns with the front office so that the appropriate action can take place."
To add to the enforcement difficulties, in CA, because timeshares are owned real property, it isn't only the ADA that applies (on the Federal level) there are state laws that apply such as the Unruh Civil Rights Act, the California Fair Employment and Housing Act, and the California Disabled Persons Act. Although ESAs are not considered service animals per the ADA, the Fair Housing Act include ESAs. So, folks who take advantage of the inability of management to ask anything but vague questions, and claim their pets are service animals, and management's hands are tied.
Thus, it brings it back to both state and federal law needs to be changed to address the scammers. We cannot blame our HOA BOD or management for the problem.