The author is not allowed to withdraw submitted manuscripts, because the withdrawal is a waste of valuable resources that editors and referees spent a great deal of time processing submitted manuscripts, money, and works invested by the journal.
If the author requests withdrawal of the manuscript when the manuscript is in the peer-reviewing process, the author will be punished with paying IDR 3.000.000,- per manuscript, as a withdrawal penalty to the journal.
However, it is unethical to withdraw a submitted manuscript from one journal if accepted by another journal. The withdrawal of the manuscript after the manuscript is accepted for publication, the author will be punished by paying IDR 6.000.000,- per manuscript. Withdrawal of manuscript is only allowed after withdrawal penalty has been fully paid to the journal.
If the author doesn't agree to pay the penalty, the author and his/her affiliation will be blacklisted for publication in this journal.