Those who were not neutral would be fired, he said here Saturday.
He, himself, would keep a distance from the three pairs of the candidates for the sake of neutrality, he said.
"I belong to the candidate No. 1, No. 2, and No. 3, but I have to keep a distance from the three pairs," he said.
He called on the candidates and supporters to implement a peaceful pilkada.
"On behalf of the Jakarta Provincial Government, I wish a happy peaceful campaign and with integrity," he said.
In the meantime, the three pairs of Jakartas gubernatorial candidates for the regional head election 2017, have declared their commitment to campaign peacefully and with integrity.
The declaration was voiced in an event at the National Monument (Monas), here, Saturday morning, and attended by supporters of the candidates.
The three pairs are Agus Harimurti Yudhoyono-Sylviana Murni, Basuki Tjahaja Purnama-Djarot Saiful Hidayat, and Anies Baswedan-Sandiaga Uno.
They and members of their success teams pledged to follow a democratic and peaceful election process with integrity, as well as maintain the Unitary State of the Republic of Indonesia (NKRI) based on state ideology Pancasila and the UUD 1945 Constitution.
They will promote the progress of Jakarta and promised to abide by every prevailing regulation.
Besides, they also promised to accept whatever the results of the pilkada, whether they are elected or not.
A decorated vehicle carnival was organized to highlight the declaration.
The campaign for pilkada began on October 27, 2016 and ends on February 11, 2017. The pilkada will be held simultaneously in 101 regions across Indonesia on February 15, 2017.