The only two sacraments instituted by Christ are baptism and the Lord's supper. Baptism is given to unbaptised adults who profess faith in Christ. It is also administered to the children of believers, who are recognised as included in God's covenant of grace, of which baptism is a sign and seal. The sacrament is performed with water, which may properly be administered by immersion, pouring or, preferably, sprinkling.
The frequency of observance of the Lord's supper is decided by each Session, present practice ranging from two to four times a year. In addition to members of the church, believers from other denominations are welcomed to the table, provided that their Christian testimony and practice are known to the elders.