The Holy Spirit comes to the church from the Father through our Lord Jesus Christ.  When John baptized Jesus at the Jordan River, he was told "…The man on whom you see the Spirit come down and remain is he who will baptize with the Holy Spirit."  (John 1:33)   To be baptized [Greek word baptizo] means to be immersed or buried.  When we whole-heartedly surrender our wills to the will of God, we immerse our whole being into the will of Christ.  After we have made the decision to accept Christ as our Head, we receive  the "Comforter," also called  "the Spirit of truth" (John 14:16, 17), as our Lord promised, to help us along the Way. 

The Holy Spirit teaches us, guides us, and enables us to produce  "the fruit of the Spirit."  (Galatians 5:22)  It also "anoints" us (or authorizes us) to play a part in God's plan for the recovery of mankind from sin and death. 

We read in Ephesians 1:22,23 that Christ is the Head, and the church is His body. I Corinthians 12:13, 14 further instructs that the baptism is for the entire body, "By one Spirit are we all baptized into one body… and have been all made to drink into one Spirit.  For the body is not one member, but many." Finally, Ephesians 4:4,5 specifies there is only one baptism: “There is one body, and one Spirit, even as ye are called in one hope of your calling; one Lord, one faith, one baptism.” 

In the Old Testament Aaron was the first high priest. Jesus is our high priest (Hebrews 7:24-26). The anointing of Aaron with oil (Exodus 30:30), is used as a picture in Psalm 133:1,2. It pictures how when Jesus (the Head) was anointed with the Holy Spirit, it covered His whole body (the church).  

There are no additional instructions to the disciples to ask for further anointings of the Holy Spirit.