Changes

# RNAV4 Route M750.

# The portion of ATS Routes A1 and G581 within Hong Kong FIR at FL290 or above is unidirectional for westbound traffic only, except during periods of the closure of RNAV5 Route M750, then A1 and G581 becomes bi-directional.

# Eastbound traffic from Hong Kong FIR to Taipei FIR joining G581 at FL270 or above shall route via ENVAR M750 DADON to join G581. Those at FL250 or below shall route via ELATO to join G581.

# ATS Route G86 within Hong Kong FIR is a unidirectional route for eastbound traffic only. However, it is bi-directional within Taipei FIR.