no, but anyway the rulebook is far from saying everything on the rankings, it's rather made for lawyers than for technical precisions : quite often the team in charge of the rankings made precisions in the rankings FAQ which were not in the rulebook for instance.
And the "Race to London" which this team in charge of the rankings has reintroduced this year on the ATP website was not even mentioned in the 2012 rulebook.
Probably. But, it would give us an idea about dates. For example,
A 2012 ATP commitment player is any player positioned in the Top 30 in the South African Airways ATP 2011 Rankings (singles) as of November 14, 2011.
From what I gather, there are no rules needed for the "Race to London". It being mentioned on the website is probably just for fans.
The top seven (7) players in the South African Airways ATP Rankings as of the Monday after the last ATP World Tour tournament of the calendar year; followed by....
I believe this makes it clear that DC final and all tournaments after the previous year WTF will be included in the "Race".(to answer the doubt in your response to Bulldog)