Simplify the following text for a Grade 12 native English-speaking person.
Original: Kohat Division ( Urdu : Ø Ù Ø Ù Ú Ú Ù Û Ø Ù ) was an administrative division of the North-West Frontier Province of Pakistan , until the reforms of 2000 abolished the third tier of government .
Simplified: Kohat Division was an administrative division of the North-West Frontier Province of Pakistan , until the reforms of 2000 abolished the third tier of government .