Follow-up from "Copy editing and clarifications for checker rules"

The following discussion from !243 should be addressed:

• @Andreas.Muetsch started a discussion: (+3 comments)

  Both if-conditions unclear, something is missing. Please check and rephrase.

  Rephrase

  12_annexes/12_02_entity_type_constraints.adoc#tab-entity-type-constraints-action[table 11]