Final answer:
The city of Grampon's rule to fine and jail creators of malware is a regulatory rule, established to protect the public from digital threats.
Step-by-step explanation:
The rule that the city of Grampon wants to implement, which would fine and jail anyone caught creating and launching malware within the city limits, is best classified as a regulatory rule. Regulatory rules are established by government bodies to restrict or prohibit certain behaviors among individuals and corporations in order to protect public welfare. In this case, the city council is acting to safeguard its citizens against the threats posed by malware, which fits within the scope of a regulatory policy designed to benefit the public by maintaining security and order within the city's digital infrastructure.