The 2005 Maritime Space Management Plan currently applies (April 30, 2017) until a new order replaces it. According to Moorea's town hall, the new decree is expected to come after a public utility investigation that would begin after the elections, i.e. at the end of May 2017. The registers of the public utility inquiry remain open for two months and then a rapporteur presents the report and finally the government will draw up a country law that will be enforced by the various delegates of public space designated by the town hall and the town hall itself. 
Download the booklet "The essentials of the Maritime Space Management Plan"
It reads (p.2) Your boat can stay anchored for 48 hours on the sand bottoms. After this period, it must be in the areas provided for this purpose, a maximum of 7 consecutive days and 90 cumulative days during the year.