If JB MK3 are allocated on only 160 & 170, then why SBS587A
is perm 7, and JB MK3s also appear on 16, 123, and 165? Are you
saying that 7, 16, 123, and 165 are cross-border services? Please
check your facts before posting and don't just say JB MK3s are only
for 160 & 170.