A Stub Citation is a Citation, normally a partial sentence, that is used as a pre-cursor to a fuller Citation, such as “Personal data shall be:” wherein the following Citations fill out the rest of the sentence.
Stub Citations do not contain Mandates. They don’t convey any particular ideas of what the reader should do. They simply serve as a mechanism to present the information that follows.
In the image from above the highlighted texts are all Stub Citations.