The Douglas councillor says a change in culture has prompted his resignation.
His resignation as chair also means he will no longer sit on the executive committee.
Mr Pitts has served the board for more than 10 years, so what has changed?
Councillor Andrew Bentley succeeds Mr Pitts as chair.
No contaminated baby milk at hospital, says maternity unit
The maternity unit at Noble's Hospital is reassuring parents after a baby milk safety scare.
TT-themed puzzle book launched
A new book is hoping to challenge motorsport enthusiasts with 37 puzzles - one for each mile on the TT course.
Mountain Road shut until Thursday
The Department of Infrastructure says the Mountain Road will remain shut until tomorrow.
Maternity unit publishes list of recalled baby formulas
The Island's maternity ward has published a list of baby formula products which have been found to contain harmful toxins.
New plans for 157 year old building at TT landmark
A planning application's been submitted to rebuild a 157 year old storeroom at a TT landmark.
EU laws help Island meet global standards, say ministers
The Council of Ministers says EU legislation about rough diamonds, firearms and drug precursors is still the best way for the Island to meet international standards.
Chance of more ice this week
Ronaldsway Met Office says there's a risk of more ice this week.
Ferry sailings called off
Two scheduled sailings have been cancelled tonight because of weather.
