I think you refer to asosiasi percawinan campur, perca. Unfortunately they held a meeting with Imigrasi and manpower with a negative outcome. At that meeting, Manpower did not accept the legal reasoning and insisted we need a work permit. Is all covered in perca website and other threads in this forum. What I see missing in all of that is Manpower actually showing the laws on which they base their position.
I think there are some issues with that PERCA website, but this is the info from that meeting.
Meeting on 7 March 2015 with Manpower officers and PERCA:
A) Holders of KITAS/KITAP sponsored by spouse are allowed to work in the company during a full work permit, including having IMTA* .
B) Foreign workers cannot work in two different places (the same profession or different) EXCEPT investor / commissioner of PMA (If one works in three places the number of IMTA must also be 3).
C) If the activities of the foreign worker are in more than 1 place / province then he/she must have an inter-provincial IMTA .
D) Case: Husband / wife of a mixed marriage with cuisine chef background want to open a small café, with a small seating area is classified as a small business and does not require IMTA. When this business grows crowded and large, than it is necessary to have operating permits from the relevant authorities . When the businesses becomes a legal entity, then this foreign worker must have IMTA.
E) Case: Foreign husband of a mixed marriage is already retired. Enters Indonesia with VOA and becomes an investor in a hotel in Bali. Once in a while he does work behind the scenes such as checks on the financial controll department. With such conditions, it means the husband has been conducting work in Indonesia and must have KITAS and IMTA, because even not all the time he is working .
F) Case: A foreigner in a mixed marriage with KITAS sponsored by wife. Working from home and having online businesses. Does not have an office and legal business such as PT or PMA. Because this foreigner is conducting work even though he only works online so this foreigner must have the IMTA. This foreigner also cannot sign work contracts in Indonesia on behalf of himself .
G) Case: A foreigner who works and own business as an acupuncturist, must obtain an official recommendation from the local health office before doing business and work activities. If already have a recommendation from the relevant authorities, the foreign must have the IMTA to be able to work in Indonesia .
H) A foreigner holder of KITAS/KITAP sponsored by spouse is allowed to work in Indonesia. The need of IMTA is to be seen from what the job, workings for a legal entity or not, small or large business .
CONCLUSION:
Although the Immigration Act 6 of 2011 Article 61 states that the holder of a Limited Stay Permit and Permanent Stay Permit can work and/or do business to make ends meet for him/her and/ for his/her family, but still has to refer back to the Labour Law No. 13 year 2003 and Permenakertrans No. 12 year 2013, which essentially mean that a foreign worker in a mixed marriage is allowed to work without a work permit if in the informal sector, freelance or have a small business which is not a legal entity. When working in a legal entity then MUST have IMTA.
NB: Although the focus were the mixed married couples , these situations are also valid for foreigners holding KITAP sponsored by their Indonesian : mother , father , brother or sister.
*IMTA = Work Permit (this became Notification)