Which of the following is correct?
There has to be rules and regulations.
There have to be rules and regulations.
Which of the following is correct?
There has to be rules and regulations.
There have to be rules and regulations.
You will hear both, but technically "there have to be rules" is correct.
If you are confused when trying to make this point, you can also say "must", which sounds a bit formal but nobody can argue with it.