Answer by taking a quote from the following article:

The Veterans Committee was the popular name of the National Baseball Hall of Fame Committee to Consider Managers, Umpires, Executives and Long-Retired Players; a former voting committee of the U.S. Baseball Hall of Fame that provided an opportunity for Hall of Fame enshrinement to all individuals who are eligible for induction but ineligible for consideration by the Baseball Writers' Association of America (BBWAA). The term "Veterans Committee" (was composed of four committees of baseball veterans) is taken from the body's former official name: National Baseball Hall of Fame Committee on Baseball Veterans (1953). In July 2010, the Veterans Committee name was changed by the Hall of Fame Board of Directors and its name was no longer officially used by the Hall of Fame, which called three new 16-member voting committees by era: the Expansion Era Committee (1973-present), the Golden Era Committee (1947-1972), and the Pre-Integration Era Committee (1876-1946) - each, "The Committee" (the term "Veterans Committee" is still being used by some sports media). The three committees met on a rotating cycle once every three years to elect candidates from each era to the Hall of Fame that have been "identified" by a BBWAA-appointed "Screening Committee" named the "Historical Overview Committee" (10-12 representatives; BBWAA members).

The Veterans Committee election process, radically changed in 2001, was revamped yet again in July 2007. The changes that most directly affected this election involved elections of non-players (managers, umpires and executives). Under the 2001 rules, elections of non-players would be held every fourth year on a "composite ballot". No candidate was elected from the composite ballot in 2003 or 2007.  With the 2007 rules changes, the composite ballot was split into two separate ballots--one for managers and umpires and the other for executives. Also, the voting membership of the Committee, which previously included all living members of the Hall, was now reduced to include just a handful of those members, plus additional executives and sportswriters (only one of whom had been among the previous electorate). Voting for both the managers/umpires and executives ballots will now take place prior to inductions in even-numbered years, starting with 2008. To be eligible, managers and umpires need to be retired for at least five years, or for at least six months if they are age 65 or older, while executives need to be either retired or at least age 65.  A Historical Overview Committee of eleven sportswriters appointed by the BBWAA's Board of Directors met to develop a ballot of ten managers and umpires; the committee members were: Dave Van Dyck (Chicago Tribune), Bob Elliott (Toronto Sun), Rick Hummel (St. Louis Post-Dispatch), Steve Hirdt (Elias Sports Bureau), Moss Klein (Newark Star-Ledger), Bill Madden (New York Daily News), Ken Nigro (formerly Baltimore Sun), Jack O'Connell (MLB.com), Nick Peters (The Sacramento Bee), Tracy Ringolsby (Rocky Mountain News) and Mark Whicker (The Orange County Register). The managers/umpires list was submitted to a sixteen-member panel composed of ten Hall of Famers (eight players and two managers), three executives and three veteran media members for a final vote. A separate ballot of ten executives was developed by a twelve-member panel including seven executives, two players and three writers, which was the same committee which did the final voting in that area. On November 8, 2007, the final ballots were released. Each panel member could vote for up to four individuals on each ballot, and each candidate who received 75% of the vote from either panel would be elected; therefore, a maximum of five inductions was possible from each ballot. Voting was conducted at baseball's winter meetings in Nashville, Tennessee on December 2, 2007, with the results announced on December 3; it was the first time since 2001 that the Committee met to discuss candidates, as the previous three elections had been conducted by mail.

Were there any rule changes for 2008?
The changes that most directly affected this election involved elections of non-players (managers, umpires and executives).