First of all, sorry for this confusion. Documents that cover controls from section A.18 can be found here: - documents in the toolkit in folder "02 Procedure for identification of requirements” ("Procedure for Identification of Requirements" and "Appendix – List of Legal, Regulatory, Contractual and Other Requirements") - control A.18.1.2 is included in the document IT Security Policy (you'll find it in the toolkit in folder 08 Annex A security controls - A.8 Asset management) in the section "3.15. Copyright".
It is important to note that every control does not need to be documented and to avoid unnecessary administrative work the toolkit includes only all the mandatory + all most common documents.
In the root folder of the Demonstration Kit, you'll find a document called “List of Documents” that explains which control/clause is covered by which document, and which documents are mandatory.