Oh Documents, Wherefore Art Thou?

In anticipation of the yearly ‘addition’ of Jakarta pseudo-residents from an influx of people from other areas coming back to Jakarta post-Lebaran, the government is heavily pushing the message ‘don’t come to Jakarta’. There’s a fine for those who do not have ‘the proper documents’.Anyone have any idea what ‘proper documents’ are needed? Might as well charge Rp 5 million entrance fee to each newcomer and give them an orientation brochure on surviving in Jakarta.