Here is the entire Faith and Practice. Below are the relevant sections from pages 11 and 80.
[From p. 11] Christian Witness to Human Sexuality
We hold that only marriage is conducive to godly fulfillment in sexual relationships for the purposes of reproduction and enrichment of life. We consider sexual intimacy outside marriage as sinful because it distorts God’s purposes for human sexuality. We denounce, as contrary to the moral laws of God, acts of homosexuality, sexual abuse, and any other form of sexual perversion (see “Human Sexuality,” p. 80). The church, however, as a community of forgiven persons, remains loving and sensitive to those we consider in error. Because God’s grace can deliver from sins of any kind, we are called to forgive those who have repented and to free them for participation in the church.
[From p. 80] Human Sexuality
[Added in 1982] Friends believe that the divine intent of marriage is to fulfill the emotional, spiritual, and physical needs of humankind and that only within the bonds of marriage divinely ordained can there be a beautiful sexual relationship for the purposes of reproduction and life enrichment. Adultery and fornication are sinful because they distort the purposes of God for the right ordering of human sexuality.
Friends believe that the practice of sexual perversion in any form is sinful and contrary to the God-ordained purposes in sexual relationships. These perversions include sexual violence, homosexual acts, transvestism, incest, and sex acts with animals. The sin nature is capable of vile affections when humankind rejects the moral laws of God.
Scriptures relating to these distorted and perverse forms of sexuality include Genesis 19:1-13; Deuteronomy 22:5; Leviticus 18:20, 22, 23; Romans 1:24-28; 1 Corinthians 5:1, 2 and 6:9-20. Neither in the Scriptures nor in church history have these practices been regarded as consistent with righteous living.
Friends do not accept as members those involved in these perverse practices; neither do they permit them to hold positions of responsibility or leadership in the church. However, Friends believe that the grace of God is adequate to cleanse and deliver from all sin (1 John 19; 2 Corinthians 5:17), and they desire to be tender and sensitive to all people, ready to express kindness, love, and forgiveness. See also Jude 7, 8; Colossians 3:5-7; and Revelation 2:18, 27. When the erring one has been repentant, the past should not be remembered. As Christ called and blessed those whom He forgave, so must His followers. Friends must not hinder the forgiven person from holding membership or having responsibility in the church.
Friends churches should exercise concern for their members on matters of sexuality and should discipline offenders in love and truth (see “Rules of Discipline” p. 46).