To change the votes given to each condo owner in the condo regulations you need to have the unanimous agreement of all condo owners (Art. 4 and Art. 12 of Condo Law #5038 of 1958). The rationale for this provision is to protect the individual owner from the possible abuse of his rights by the majority. Imagine an owner who is constant pain to the other owners, wouldn't they be tempted, if allowed, to lower his voting rights to next to nothing?
Golo, common areas cannot be sold just like that or be subject to particular deals between the developer and a particular owner. Again, to legally change a common area to a private area you need the unanimous consent of all the owners (Art. 8 of Condo Law #5038 of 1958). What I have seen happen is that the developer tells a prospective buyer that a particular area is a common area, however, the condo declaration says something different. That's why you should never buy a condo without:
1) reading the condo regulations and making sure that they have been recorded, or what amounts to the same thing, that the condo you are buying exists as a legal entity.
2) making sure that upon paying your money you get your rights recorded.
Of course, when you ask for 1) and 2) above from your standard Santo Domingo developer, he will look at you as if you came from Mars. Most condo towers, even in the ritziest section of town, presell most times even without an existent title to the condo. This is "NORMAL" practice in Santo Domingo. The buyer is totally unprotected if the developer goes bankrupt or just plain walks away from the project. When he tries to record his "promesa" at the Registry he will find a bank with a zillion peso or dollar mortgage ahead of him and he will have no recourse but to buy from the bank again, that is, paying twice for the condo.
Last year I represented a client buying a $1.3 million US penthouse in a condo tower in Santo Domingo. When I asked for the required documents (construction license, title to the property, survey, condo declaration, etc.) before allowing my client to disburse any funds, the reaction one of my associates received from the developer was: "your firm obviously does not deal with real estate" (!)