Ann: Voluntary Suspension, page-25

"In other words, if the securities have been suspended for more than 5 days in 12 months, securities and rights issues become considerably more complicated and expensive (although ASIC may be prepared to grant relief if it believes that the suspension has not prevented the market's being fully informed)."

"It should also be noted that suspensions of more than two trading days prevent a company's offering shares or options to employees without a prospectus (under Class Order 03/184)."

"Another issue is the qualitative difference between trading halts and voluntary suspensions. Despite ASX's comment that suspensions should not be seen as the "less attractive" of the two, the reality is that the adverse effects of a suspension will continue to dog their use."

https://www.claytonutz.com/knowledge/2011/march/the-known-unknowns-trading-halts-made-easier-by-asx