The rank requirements in this book are official as of Jan. 1, 2019. If a Scout has started work toward a rank before that date using requirements that were current before Jan. 1, 2019, except as noted below, the Scout may complete that rank using the old requirements. Any progress toward a rank that is begun after Jan. 1, 2019, must use the requirements as they are presented in this Scouts BSA Requirements book.
With the February 2019 addition of girls to the program, there began two Scouts BSA Handbooks. Requirements for program and advancement are the same.
Changes from the 13th edition include grammar and formatting; references to Boy Scouts are now Scouts BSA; images: the Girls version includes photographs of girls while the Boys version includes photographs of boys and updated youth protection guidelines.
13th Edition of Boy Scout Handbook (2016)
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 handypage number reference list.