Binaries reproducibility question

Binaries 26.06.7 release notes say:

Reproducing the binaries. Full build instructions will accompany the source release. This release was not built with the default optimisation settings, so a standard build will not reproduce these checksums; the exact parameters will be published alongside the source.

Should we understand from that that we will be able to build the binaries in a reproducible way (getting same checksums) with the undisclosed source code when it becomes available?

Start with the 26.06.7 release notes and the accompanying source release and build instructions. Confirm whether the published source and exact build parameters are sufficient to reproduce the released checksums, then clarify the answer in the release documentation or issue discussion.

Written by the indexing model from the issue text.