See this example properly formatted in the QUT Cite tool.
Standard in-text citation examples are in Getting started - In-text citation.
Author. A. A. (Year). Title of the standard (No. 1234). http://xxxxxx
Nursing and Midwifery Board of Australia. (2013). National competency standards for the registered nurse. https://www.nursingmidwiferyboard.gov.au/documents/default.aspx?record=WD10%2f1342&dbid=AP&chksum=N5ws04xdBlZijTTSdKnSTQ%3d%3d
Usually the author would be the organisation that made the standard.
For more information on Corporate authors, see the Authors button below.
Include a number for the standard only if one is available.