Take a look at the Jawbn arrival into BFI, should be under KBFI 10-2 something. This arrival is shared between BFI and SEA. See the crossing restrictions at Jawbn and assume you are landing 31 at BFI. Do you have to cross Jawbn at 16K and 280knots or is that only for SEA traffic. Assume you have been cleared to descend via the Jawbn arrival by Seattle approach.