I want to know the answer to the following question:
When did Sega finally permit third-party publishing?
All the background I'm provided with is that "Because Nintendo controlled the production of all cartridges, it was able to enforce strict rules on its third-party developers, which were required to sign a contract by Nintendo that would obligate these parties to develop exclusively for the system, order at least 10,000 cartridges, and only make five games per year.". Is that enough to answer the question?