Can condo association tell me what I can and cant do with my land?

I live in a stand-alone condo that is part of a condo association.  I own my house and land but the association seems to think they have the right to tell me what and where I put things on my lawn. I have a custom wood swing set on the rear of my property that the association says must be within 16 ft of the rear of my house.  My property line is 54 ft from my house. Can they tell me I can't put this at the rear of my land