The dual structure of the Chinese polity, with the Party as the core political centre and the state as its administrative/operational part, is perhaps nowhere more visible than in the system of rules and regulations of the Chinese Communist Party.
The regulatory power of the CCP has been overlooked both by China watchers and China lawyers. While the former group may find little value in the technicalities involved in how the Party manages and governs itself, the latter group prefers approaches grounded in state-centred conceptions of regulation.
Regulations of the Chinese Communist Party pose the added conceptual difficulty of cutting across the divides among areas of legal practice lawyers in civil and common law jurisdictions are familiar with. Next, comes the question of where the regulatory authority of the Party originates from.
The answer to this question is contained in the Regulations of the Communist Party of China on Enacting Party Laws and Regulations.
Regulations of the Communist Party of China on Enacting Party Laws and Regulations
Central Document no. 5  no. 5
Chapter I. General Principles
Article 1. The Present Regulations are enacted on the basis of the Constitution of the Communist Party of China, in order to standardize the work of enacting Party laws and regulations, establish and improve the system of Party laws and regulations, raise the level of scientific construction of the Party.