Abstract :
Since Government Regulation Number 57 year 2010 is legislated, merger restraint system in
Indonesia had changed from pre-merger notification to postmerger notification, where there is
problem if that merger had implemented is deemed monopolize and or have bad impact to
business competition so must be canceled. Whereas, before that government regulation is
legislated, merger restraint system in Indonesia was regulated by Commission for the
Supervision of Business Competition Regulation Number 1 year 2009 which use pre-merger
notification system. The problem will be researched are how is the impact of that Government
Regulation toward the merger notification of business; which regulation give law certainty so
must be used in merger of business. This research use normative law research method which
focus on law norm, examine literature and interview. The conclusion of this research is
Government Regulation Number 57 year 2010 can?t gives a law certainty toward merger activity,
because merger who had declared legally, had been implemented and had spent a lot of money is
deemed illegal after investigated by KPPU (Commission for the Supervision of Business
Competition). From the law certainty, KPPU Regulation gives more certainty of law. It is best
for government to reconsider the effectiveness of that government regulation, because the merger
activity develop increasingly from day to day. The business subject are better notify their merger
plan to KPPU previously, to make a good condition in business competition.