Then it is incorrectly forbidden:
“The norms of the Roman Missal admit the principle that in cases where Communion is administered under both kinds, “the Blood of the Lord may be received either by drinking from the chalice directly, or by intinction, or by means of a tube or a spoon”.[%between%](file:///C:/Documents%20and%20Settings/Matthew/Desktop/Redemptionis%20Sacramentum%20%282004%29.htm#_ftn191) As regards the administering of Communion to lay members of Christ’s faithful, **the Bishops may exclude Communion with the tube or the spoon **where this is not the local custom, though the option of administering Communion by intinction always remains.” (Redemptionis Sacramentum 104)
There is also nothing in the General Instruction of the Roman Missal that says intinction is or can be forbidden in particular places.
In England and Wales, where I live, intinction is not recommended, but that is not the same as it being forbidden, because it cannot be forbidden.
And, by the way, just because Jesus did something in a particular way does not tie the Church to doing it in the same way. I’m sure the very first Mass was not quite like the Mass we both know! You have to allow room for legitimate liturgical development.