As mentioned in Bryan on Scouting, since the rank requirements section (beginning on page 438) doesn’t include page numbers, Bob Gayhart of Peoria, Ill., prepared a list of the page numbers for each requirement through First Class. See his handy page number reference list.
When new or revised merit badge requirements appear in this Boy Scout Requirements book, any Scout beginning work on a merit badge must use the requirements as stated therein. However, if changes to merit badge requirements are introduced in a revised merit badge pamphlet or at www.scouting.org/meritbadges throughout the year, then the Scout has through the end of the current calendar year to decide which set of requirements to use.
Once a Scout begins work, he may continue using the requirements he started with until completion of the badge. Alternatively, he may choose to switch to the revised requirements. Sometimes, however—especially for more significant changes—the Boy Scout Handbook, the Boy Scout Requirements book, www.scouting.org/meritbadges, or official communications from the National Council may set forth a different procedure that must be used. The National Council may establish a new date for when use of the existing requirements must cease.
There is no time limit between starting and completing a badge, although a counselor may determine so much time has passed since any effort took place that the new requirements must be used.
No council, district, unit, or individual has the authority to add to, or to subtract from, any advancement or merit badge requirements. For more detailed information, see the Guide to Advancement, which is available online at https://www.scouting.org/resources/guide-to-advancement/.