EC has given away vistors’ car space

The EC of my block has voted to allow a select group of owners to have exclusive use of one of the three vistors' car spaces. This means that a common asset has been given away to a small group of owners who were not prepared to pay the additional cost of a car space

My first question is:

can they do that?

Then, to add insult to injury, two cars are now parked in the car space which is intended  for only one car. They extend onto common property and restrict access to my own car space

My second question is:

can I do anything about that?

Paul