What aspect is described as being prescribed by law in the Hong Kong Special Administrative Region?

The aspect described as being prescribed by law in the Hong Kong Special Administrative Region is the monetary and financial systems. Under the Basic Law, which serves as the constitutional framework for Hong Kong, the region is authorized to maintain its own monetary system, separate from that of mainland China. This includes the ability to issue its own currency and manage its financial regulations and policies. The Basic Law ensures that these systems remain stable and regulated by law, reflecting the principle of "one country, two systems."

While agricultural policies, the educational system, and the transportation network are also important areas of governance in Hong Kong, they do not receive the same level of constitutional protection under the Basic Law as the monetary and financial systems. The latter is specifically highlighted due to its critical role in maintaining economic stability and fostering confidence in the region's financial integrity, which is paramount for its status as an international financial center.