It’s a nonsense to suggest (whoever is suggesting it) that no spend limits, delegations or restrictions apply on the basis that the money is EMR.
That just demonstrates a fundamental misunderstanding (to put it politely) of what they are doing.
They have created a false scenario which facilitates an inappropriate deviation from basic principles.
Financial controls apply regardless of which allocation the money is allocated from. You may be approaching this the wrong way. Don’t look for a regulation which precludes unrestricted spending, demand that the reference be produced which authorises it - there isn’t one!