The Floo Regulation Panel is a committee that is possibly within or a predecessor to the Floo Network Authority in charge of connecting fireplaces to the Floo Network and maintaining those connections.
The Floo Regulation Panel controls which fireplaces are connected to the Floo Network. It is against regulations for a Muggle fireplace to on the Floo Network, although Arthur Weasley manages to have the Dursley's blocked (unbeknownst to him) front room fireplace connected when he and the twins come to pick up Harry Potter. A simple spell is all that is needed to disconnect a fireplace from the Network.
Virtually all wizarding homes are connected to the Floo Network. Other connections to the Network exist at wizarding workplaces and the Ministry of Magic, although the fireplaces at Hogwarts are not usually connected
- Harry Potter and the Goblet of Fire (Mentioned only)