Here's how I was forced to come to this conclusion.
GIVEN: the Imperium TL timeline is accurate
GIVEN: the Imperium TL takes the High Guard TL charts into account.
High Guard was designed to let the Third Imperium fight the Fifth Frontier War. The 3I's history was fleshed out to track expansion with technological improvements... roughly.
So 3I gets a vote, and HG2 gets a vote, and both crowd out Book 2. Their TL is canonical, especially for the OTU.
Page 22 is an exception, an allowance. Interestingly, it is exactly what the Xboat design needs to be a "TL 10 design". So Book 2 is not invalidated, even though it does not represent the technological timeline. Thus components fabricated at lower TLs.
***
Loren's Rules apply. If you construct a CT Book 2 ATU, the TL tables change and you get Jump 4 at TL 10.
I'm not sure what other implications come out of this. A Book 2 Imperium can be constructed. It'll look a little different, but it's still Traveller.
***
As Loren said, the referee can change almost anything... except the speed of communication.
GIVEN: the Imperium TL timeline is accurate
GIVEN: the Imperium TL takes the High Guard TL charts into account.
High Guard was designed to let the Third Imperium fight the Fifth Frontier War. The 3I's history was fleshed out to track expansion with technological improvements... roughly.
So 3I gets a vote, and HG2 gets a vote, and both crowd out Book 2. Their TL is canonical, especially for the OTU.
Page 22 is an exception, an allowance. Interestingly, it is exactly what the Xboat design needs to be a "TL 10 design". So Book 2 is not invalidated, even though it does not represent the technological timeline. Thus components fabricated at lower TLs.
***
Loren's Rules apply. If you construct a CT Book 2 ATU, the TL tables change and you get Jump 4 at TL 10.
I'm not sure what other implications come out of this. A Book 2 Imperium can be constructed. It'll look a little different, but it's still Traveller.
***
As Loren said, the referee can change almost anything... except the speed of communication.