BBC follows two Church ordinances: Believer's Baptism and Lord's Supper.
We follow the immersion for the Believer's Baptism as a symbol of Christ's death, burial, and resurrection.
"And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him,
and he saw the Spirit of God descending like a dove, and lighting upon him." -Matthew 3:16
The Lord's supper is the breaking of bread (unleavened bread) and drinking of wine (pure grape juice) as commanded by Christ to do in remembrance of Him.
"And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.
After the same manner also he took the cup, when he had supped, saying, this cup is the new testament in my blood: this do ye, as oft as
ye drink it, in remembrance of me. For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come." -1 Corinthians 11:24-26