Da Italiano a Inglese Tecnico/Meccanico Governo/Politica due diligence

Manifestazione di interesse per il conferimento di incarico nell'ambito del **redigendo** piano per eliminazione delle barriere architettoniche (my emphasis)

(for example)

I can only assume this means that the plan is currently being drawn up, but I'd never heard the word used as an adjective in this manner so I was seeking confirmation / correction. Also, if that is indeed the meaning, is there any handy way of expressing the concept in English without having to write a long and inelegant string of prose)

TIA
Derek