Any man that has a leading role in a local church is required to only have ONE WIFE. In 1st Timothy 3:1-13 the Apostle Paul gave the qualifications for elders and deacons and he stated this condition for both in verses 2 and 12, “An overseer (elder), then, must be above reproach, the HUSBAND OF ONE WIFE…Deacons must be HUSBANDS  OF ONLY ONE WIFE” (NASB). This is clear so the answer to your question is an emphatic NO! When God instituted marriage He brought the woman to Adam and He said, “For this reason A MAN shall leave his father and mother, and be joined to HIS WIFE; and they shall become ONE FLESH.” From this we learn that ALL MEN, not just those who have a leading role in a local church, should only have ONE WIFE.

I could stop there, but I feel compelled to address something else that you mentioned in your question. You speak of a “pastor…giving the sacrament to his church people.” I believe there is a misconception in the minds of many what a “pastor” is so I would like to point you to some scriptures that teach us what the “gift of a pastor” is and thus what his role is in the church. In Ephesians 4:11 we read, “And He (Christ) Himself gave some apostles, some prophets, some evangelists, and some PASTORS and teachers (NKJV). The “apostles and prophets” were gifted men who laid the foundation of Christianity by teaching the fundamental truths concerning the Person and Work of Christ (see Ephesians 2:20 and 1st Corinthians 3:10). The “evangelist” is one who preaches the good news of salvation through Jesus Christ to lost sinners (see Acts 8:5 & 21:8). The “teacher” is one with a good knowledge of Scripture and has the ability to teach others what he has learned (see Acts 11:25-26). And finally, the “pastor,” which means “shepherd,” is one who has real heart for the saints and desires to see them: 1) grow spiritually, 2) comforted when they are going through trials, and 3) restored to fellowship with the Lord and fellow-believers when they wander away from the Lord (as “sheep” are prone to do). The idea that a pastor is one who leads a congregation in worship and ministry and who has “all the gifts rolled up into one” is not based on Scripture; in fact, there is not one scripture that speaks of “a pastor of a church.”

We spoke earlier of “elders” and their qualifications. These are MEN (there were always more than one elder in the local churches mentioned in Scripture) who are called to bear OVERSIGHT over a local church. The Apostle Peter wrote of this in 1st Peter 5:1-3, “The ELDERS who are among you I exhort, I who am a fellow ELDER…SHEPHERD the flock of God which is among you, serving as OVERSEERS, not by compulsion but willingly, not for dishonest gain but eagerly; nor as being lords over those entrusted to you, but being EXAMPLES to the flock.” Here we see that the ELDER is 1) one who is OLDER AND EXPERIENCED in the Christian life, 2) one who is exercised to WATCH OVER the flock to see if they are going on with the Lord, and 3) one who is qualified to GUIDE the saints by being a GODLY EXAMPLE. He is NOT to be lording it over the Lord’s people, for he is NOT the “head of the church” (Christ alone is the Head of the church…see Ephesians 4:15 and Colossians 1:18). In light of this truth, he is NOT to “give the sacraments to other believers in a local church,” nor will he pretend to have, as we saw earlier in Ephesians 4:11, all the gifts that Christ gave to the church.  (427.5)  (DO)