"All authority in the Church is derived from the Word of God and is vested in the local assembly under the Lordship of Jesus Christ, subject to the counsel and oversight of the district and international leadership."
If you are looking for the most current , here is where to find it:
The manual requires that every new member be baptized by immersion (unless physically impossible). If you were baptized as an infant in another denomination, the manual allows the local pastor to determine if a "believer's baptism" by immersion is required.
The manual is not just for laypeople; it is the textbook for licensing and ordination. To become a Foursquare minister, one must memorize large portions of this manual.