It is important to know what the General Instruction to the Roman Missal (GIRM)
says about reception while kneeling and on the tongue:
"The norm established for the Dioceses of the United States of America is that Holy Communion is to be received standing, unless an individual member of the faithful wishes to receive Communion while kneeling." (GIRM [2011], n. 160)
The 2011 GIRM cites at this point the Congregation for Divine Worship and the Discipline of the Sacraments' Instruction Redemptionis Sacramentum (March 25, 2004), no. 91, which reads:
"In distributing Holy Communion it is to be remembered that ‘sacred ministers may not deny the sacraments to those who seek them in a reasonable manner, are rightly disposed, and are not prohibited by law from receiving them.’ Hence any baptized Catholic who is not prevented by law must be admitted to Holy Communion. Therefore, it is not licit to deny Holy Communion to any of Christ's faithful solely on the grounds, for example, that the person wishes to receive the Eucharist kneeling or standing."
Can a Bishop Prohibit Receiving Communion on the Tongue?
catholic.com
“The universal law of the Latin rite is that we receive Communion on the tongue. To receive in the hand is an indult or special permission that does not exist in most parts of the world. By law, it is a right of the faithful to receive on the tongue, and the faithful must not have their rights denied.
The Vatican promotes Communion on the tongue not only for its long tradition but because it “expresses the faithful’s reverence for the Eucharist” and “removes the danger of profanation of the sacred species” (Memorial Domini 1277).”
Once again from the GIRM:
“The consecrated host may be received either on the tongue or in the hand, at the discretion of each communicant. . . . The priest raises the host slightly and shows it to each, saying, Corpus Christi (the body of Christ). The communicant replies Amen and receives the sacrament either on the tongue or, where this is allowed and if the communicant so chooses, in the hand. (160–161)”