About 13,000 nurses, midwives and health workers have signed a petition to protect penalty rates for Australian workers. Queensland Nurses Union (QNU) secretary Beth Mohle has delivered the petition to local Labor MP Terri Butler outside Princess Alexandra Hospital. The Fair Work Commission is reviewing retail and hospitality penalty rates, with a finding set to be handed down in August or September. The QNU petition is latest in a series of protests by health workers around the country.