The ontological status of interpretation instructions ​

The instruction that we attach to the description so that the recipient can interpret it correctly has the same status as the regular description and meets all the requirements that we have for the description.

It is written somewhere; we are not very concerned about the physical parameters of its carrier (extent in space and time); what matters to us is what it refers us to.

We have no reason to consider such an instruction as anything other than a description, --- this is indeed a description, but a description formulated in a meta-language.