I had saved this to my computer when I was looking for work and so I could provide it if asked about it. I am 99.99% sure this came from Atlantis.
You can work with the KITAS you already have . What you may add to your KITAS is the Work Permit (IMTA) .
The doubt about it is that still there is no Regulation to implement this part of the Law . Below is the related part of the Law .
UU no.6 , year 2011 , Article 61 (not the official translation)
Limited Stay Permit/KITAS holder referred to in Article 52 letter e and f, and the holder of a Permanent Stay Permit/KITAP as referred to in Article 54 paragraph (1) letters b and d can work and/or do business to support himself/herself and his/her family.
We are allowed to provide for our family by working or setting up/ doing business (cf art. 61 UU 6/2011).
We shouldn't be subjected to an IMTA per se which in bahasa indonesia stands for Izin Mempekerjakan Tenega Kerja Asing because, legally speaking we can't be considered as TKA (cf elaboration I made in a few posts about what TKA are, based on art. 1 UU 13/2003 and penjelasan art. 39 UU 6/2011).
If the RI Government wants to subject us and our right to provide for our families to any regulation they can obviously do so. But the first step would be to draft said regulation, which has not been so yet.
The law (UU 6/2011) says that the government had 1 year since the enactment of UU 6/2011 to pass all necessary regulations to fully implement UU 6/2011. It has not been done.
UU 6/2011 is a Law/Undang Undang. It is of higher hierarchy than any governmental regulation, ministerial decision, regional regulation...etc, therefore any stipulation of any any governmental regulation, ministerial decision, regional regulation or any UU having been passed prior to the enactment of UU 6/2011 contradicting it or forbidding us to work and provide for our family should be considered void.
In order to respect the spirit of article 61 UU 6/2011 (ie: ALL those WNA married to WNI should be given a chance to provide for their family), any regulation drafted to regulate our right to work should be as flexible/non coercitive as possible, in order to give a chance to all of us to provide for our family. Basically it means that the conditions of experience, expertise, language, association with Indonesian worker...etc can obviously not be applicable to us. You can not say to a Pakistani buruh who would have married an Indonesian TKI " sorry mate, you can't provide for your Indonesian wife and kids because you do not have a PhD to work as a manual worker in this factory" or you can't say to this young 20 years old Brit "sorry mate, you can't provide for your pregnant indonesian wife because you need five years experience to be allowed to work"..etc
Except few exceptions (that I don't know) , only a PT company can get an IMTA (more details in Article 4 of PerMen no.16 , Tahun 2015) .