Route specific NOTAM documentation, if specifically edited by the operator" must be retained for a period of three months
It means that the company must retain any notam
produced by the company itself, being the notam available on the net retraceble at later stage.
So, according to Jar Ops no needs to retain any notam till your company makes use of other editor notams.
where I can find a definition of route specific NOTAMs?
I do not know.
My self interpretation says dep, dep altn if any, destn, destn altn(s) if any, all the enroute airport which allow you to remain within 60 min rule from planned track, etops altn if any.
Ciao