Many denominations and churches use these verses as marching orders:
Matthew 28
19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.
In your view, who are these instructions for?
The disciples?
All future Christians?
Preachers only?
All of the above?
The immediate context if studied carefully beginning in verse 7 and the instrutions given the women by the angels and by Christ prove this was a spectial meeting place in Galilee long after his several appearances to the apostles in Jerusalem. Note the words used in the instructions "brethren...disciples." This is the only noted public meeting place given advance notice and sufficient room for the over 500 brethren mentioned in 1 Cor. 15:6 to have met him.
Verse 16 identifes the eleven are being considered as "disciples"
Verse 19 "teach" or literally "make disciples" characterizes the nature of the command in its primary verb.
Note the distintion between three different groups in verses 19-20 ("ye" versus "them" versus "all nations" and who among these three are being commissioned to "make disciples."
The very nature of the command requires that only those already received the gospel, baptism and instruction could carry out this commission. Thus it is limited to "disciples" as Jesus says "whatsoever I HAVE" commanded you.
The last segment of this commission demands that these newly baptized believers (v. 19) are "added" to either an already existent congregation (Acts 2:41) or are being constituted in a newly formed congregation (Acts 14:21-22) as the final sement is impossible to "observe" outside a New Testament congregation.
Thus the very nature of this commission denies it was given to anyone but those already in a congregation of baptized believers. This is precisely the kind of congregation that not only had been meeting habitually with Christ since the baptism of John (Acts 1:21-22) but continued to habitually meet after the ascension of Christ right to Pentecost and unto whom the three thousand were "added" unto (Acts 3:41,46).
Finally, the age long promise "I will be with you always even until the end of the world" proves it is not given to the apostles or merely individual disciples but New Testament congregations of baptized believers or a plural "ye" or "you" that would administer this through its ordained leaders as seen in Acts 1-8 and Acts 13:1-4 through Acts 18:22. And as seen in Revelation 2-3; 22:16.