Joining Another Society. SECTION 16. It shall be the duty of the
members of The Mother Church and of its branches to promote peace on
earth and good will toward men; but members of The Mother Church
shall not hereafter become members of other societies except those
specified in the Mother Church Manual, and they shall strive to
promote the welfare of all mankind by demonstrating the rules of
divine Love.

Forbidden Membership. SECTION 17. A member of The First Church of
Christ, Scientist, in Boston, Mass., shall not be a member of any
church whose Readers are not Christian Scientists and members of
The Mother Church.

Officious Members. SECTION 18. A member of The Mother Church is not
entitled to hold office or read in branch churches of this
denomination except by invitation.

Legal Titles. SECTION 19. Students of Christian Science must drop the
titles of Reverend and Doctor, except those who have received these
titles under the _laws_ of the _State_.

Illegal Adoption. SECTION 20. No person shall be a member of this
Church who claims a spiritually adopted child or a spiritually
adopted husband or wife. There must be legal adoption and legal
marriage, which can be verified according to the laws of our land.

Use of Initials "C.S." SECTION 21. A member of The Mother Church
shall not place the initials "C.S." after his name on circulars,
cards, or leaflets, which advertise his business or profession,