Well, it's obvious - NO! Surely that's blindingly obvious, otherwise it'd just say 'First solo flight'........
A FI(R) can authorize a first night solo (i.e. is physically capable of writing on a piece of paper), but to do so would be contrary to the ANO as Strateandlevel states and hence illegal.
'A FI(R) shall not authorize a first night solo' is probably more correct in JAR-speak......and if you are so keen on trying to be accurate, note that there is no such thing as a 'Night Rating'.