Contact your states attorney general or a local lawyer as each state has different requirements. Public Schools in general have many policies that govern service dogs.
laws govern motion
The Ten Commandments are the body of laws that govern the Church.
Canon Law is the body of laws that govern the Church.
I've attached links to sites that have collections of state laws regarding service dogs to the bottom of this answer.
Laws and regulations set forth by statute to govern the operation and personnel of civilian employees of the government (federal and state). For the US, See: http://en.wikipedia.org/wiki/United_States_Civil_Service_Commission
create laws,and govern
The American's with Disabilities Act does not apply to service dogs in training. Some states have laws which permit trainers to take service-dogs-in-training to the same places fully trained service dogs can go. However, most states require service-dogs-in-training to be accompanied by a trainer from a recognized program for training service dogs and that they carry credentials which they show on request.
Your resolution lies with the board. Service dogs may be covered in the By-laws or in the declaration. Certainly, the 'house rules' govern service dogs. If there is no document that covers service dogs, and the animal's behaviour is not a threat to the community, and the board wants to accommodate the dog, it may remain. A resolution detailing the conditions for the animal's residence with a board vote is in order. Weight limits for dogs protect the community and the owner, who must potentially carry the dog out in the case of an emergency. What approvals were given when the service dog became a member of the household? What permissions, proofs and requirements were established? In order to evict the dog, the board must prove that the dog's residency violates the 'rules' and that there has been no accommodation given for the animal.
Like all service dogs, guide dogs still have access issues when entering some places. Every major country has laws in place to protect the disabled including using their guide dogs. Many businesses, restaurant's, taxis, apartments and others still refuse to accommodate service dogs. In the US the Americans with Disabilities Act (ADA 1990) is one of the many laws that protects service and guide dogs. Nearly each State has their own laws which give harsh penalties for violating these rights. Denying a valid service/guide dog could cost a business many thousands of dollars in fines, penalties and even result in jail for the individual, depending on state laws.
Federal employees are divided into two groups -- military service and civil service. Civil service means civilian service. The Civil Service System is the set of laws and regulations that govern civilian employees. The term also extends to government bodies that have no military.
A disabled person may train their own service dog. But check your state laws first. Not all states allow public access with a service dog in training and some only allow if you are with a professional service dog program. The ADA does not cover service dogs in training. It is suggested that all service dogs be trained to the standards of Assistance Dogs International (ADI)