(** * Aging and operational steps *)

Lemma jsafeN__age {G C Z HH Sem Jspec ge ora q n} jm jmaged :
ext_spec_stable age (JE_spec _ Jspec) ->
age jm jmaged ->
le n (level jmaged) ->
@jsafeN_ G Z C HH Sem Jspec ge n ora q jm ->
@jsafeN_ G Z C HH Sem Jspec ge n ora q jmaged.