Actually I don’t have a link, but here are the instructions from the GIRM sections 281 and 282
COMMUNION UNDER BOTH KINDS
281 Holy communion has a more complete form as a sign when it is received under both kinds. For in this manner of reception a fuller sign of the Eucharistic banquet shines forth. Moreover there is a clearer expression of that will by which the new and everlasting covenant is ratified in the blood of the Lord and of the relationship of the Eucharistic banquet to the eschatological banquet in the Father’s kingdom.
282 For the faithful who take part in the rite or are present at it, pastors should take care to call to mind as appropriately as possible Catholic teaching according to the Council of Trent on the manner of communion. Above all they should instruct the Christian faithful that, according to Catholic faith, Christ, whole and entire, as well as the true Sacrament are received under one kind only; that, therefore, as far as the effects are concerned, those who receive in this manner are not deprived of any grace necessary for salvation.
So as I see it the whole thing comes down to a matter of choice on the part of the laity as to whether or not they receive under both species.
As I have said before, I just don’t understand why someone would particularly want to receive under both when either suffices. I have no objection I just don’t fully comprehend it thats all. I guess that I am old fashioned, but I still see the Holy Mass as primarily the re-presentation of the sacrifice of Christ and secondarily as a meal. Sorry, but I guess it is too ingrained in me to neglect or forget.
And as to the sacrificial aspect of the Mass, he specifically referred to It as the Eucharistic Meal, and made absolutely no mention of the sacrificial aspect at all. But then again, you seldom hear that anymore anyway.