Handbook 2 had several policies limiting the use of the chapel. Most of these were removed or revised when the new General Handbook was published in 2020. Sources:
On music and cultural events in the chapel:
Handbook 2 (May 2019)
14.9.1: "Some cultural and recreational music may be presented in the chapel on weekdays. However, the cultural hall is usually a more appropriate setting for such music. … Applause is not usually appropriate in the chapel."
General Handbook (February 2025)
19.3.5: "The chapel may occasionally be used for cultural arts events that include secular music, such as concerts, recitals, and other presentations. While applause is discouraged in worship services, it may be appropriate for these events."
On marriages performed in Church buildings:
Handbook 2 (May 2019)
14.9.5: "Civil marriage ceremonies should be simple, conservative, and without pomp in the proceedings. When a wedding ceremony is held in a Church building, a wedding march is not appropriate."
General Handbook (February 2025)
38.3.4: "Weddings performed in Church buildings should be simple and dignified. Music should be sacred, reverent, and joyful. Marriages may be performed in the chapel, the cultural hall, or another suitable room."
On photos of general authorities:
Handbook 2 (May 2019)
21.1.6: "Members should not take photographs of General Authorities or Area Seventies in chapels."
General Handbook (February 2025)
38.8.4: "Members should not take photographs of General Authorities, General Officers, or Area Seventies in chapels during meetings."
On decorations in the chapel:
Handbook 2 (May 2019)
21.2.2: "With the exception of flowers, decorations may not be placed in the chapel area of the meetinghouse."
Meetinghouse Facilities Guide
"Decorations other than flowers may not be placed in the chapel during sacrament meetings."
On photos, videos, and broadcasts in the chapel:
Handbook 2 (May 2019)
21.2.10: "Taking photographs or making video recordings in chapels is not permitted. Meetings and other events that are held in the chapel may not be broadcast over the Internet or by any other means (see 18.3.1 for an exception)."
18.3.1: "If necessary, conference sessions may be broadcast to other locations in the stake."
18.6.4: "Video recordings and computer or other electronic presentations should not be used as part of a funeral service. Nor should the service be broadcast on the Internet or in any other way."
General Handbook (February 2025)
29.8: "To preserve the sacredness of Church meetings, no one should take photographs or make video recordings of sacrament meetings or stake conferences."
29.7: "For the benefit of these members and others, the bishop may authorize livestreaming of sacrament meetings (see 29.2.1.5), baptismal services, funerals, and other ward meetings. The stake president may authorize livestreaming of stake conference (see 29.3.1) and other stake meetings."
The General Handbook does say this:
General Handbook (February 2025)
35.5.7.1: "Chapels are rooms where members worship and partake of the sacrament. Meetings and activities held in chapels should be in harmony with these purposes."
