What is the minimum number of years a principal official in Hong Kong must have ordinarily resided in the region?

The minimum number of years a principal official in Hong Kong must have ordinarily resided in the region is indeed 15 years. This requirement reflects the understanding that principal officials should have a substantial connection and understanding of Hong Kong's society, culture, and political landscape, which can only be acquired through a significant period of residence.

The 15-year residency requirement helps ensure that these officials have a deep familiarity with local issues, promoting governance that is more attuned to the needs and perspectives of the local population. It also underscores the importance of stability and continuity in the region's leadership, as well as the integration of officials into the community they serve.

While some other options propose shorter or longer residency periods, they do not align with the established legal standards set forth in the Basic Law. The emphasis on a 15-year residency serves to strengthen the commitment to a stable and knowledgeable government representative of Hong Kong's unique context.