...MELBOURNE (Standard & Poor's) Feb. 17, 2015-- Standard & Poor's Ratings Services today assigned its '###-' issue credit rating to National Australia Bank Ltd.'s (NAB; ##-/Stable/A-1+) proposed NAB Capital Notes. Standard & Poor's rates the NAB Capital Notes four-notches below NAB's stand-alone credit profile (SACP) of 'a'. The starting point of SACP reflects our view that it is unlikely that the Australian government's support for NAB and other Australian banks--if needed--would extend to the hybrid capital instruments issued by the banks. To arrive at the rating on the NAB Capital Notes, Standard & Poor's deducts four-notches off NAB's SACP reflecting the following factors: + We deduct one-notch for the NAB Capital Notes' subordinated status; + Two-notches for the risk of partial or untimely payment; and, + One-notch for a nonviability contingent capital feature that would require NAB to convert all or a proportion of the NAB Capital Notes into ordinary shares or write them off, if a Non-Viability...