What are the rules in florida for my parents to waive the condo fees. My dad is vey sick my mom had toquitjob?

My mom is 74 , my dad is 84 disabled and now is delusional with his dementia. my mom cannot leave him alone, so she had to quit her p/t job. they cannot pay the oc. fees now. she has the condo for sale, but it is takingalonger time than she thought. what are the rules on waiving the fees? and do you know of a website that we can go to to ask questions for the elderly?