The documents that can be used to issue regulations are A. Order B. Decision C. Notice D. Notice.

The answer given in the book is AC, and I personally think D is also for the following reasons:

The language used to announce what should be observed or known within a certain range is called notice. The scope of the announcement is smaller than that of the announcement, and its related matters only require the relevant personnel to abide by and implement it, which plays a binding role in a certain range of the public. Such as the Notice of the State Council on Maintaining Civil Aviation Safety.