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It is not stated in 3.b. but I assume the actual starting line is the front edge of the 1in. tape (closest to the terminal barrier) and is the same for the .2m & 8.2m lines with the inside edge of the track tape defining the Track width.

Yes and no. The tape for the start line - correct. The other tapes are really up to the event supervisor as long as timing begins exactly 0.2 m from the start line and ends 8.2 m away from the start line. The Event Supervisor will let the team members know which edge of the tape correspond to each of the lines specified in the rules. Finally, yes the inside edge of the side tape should defined the track width.