Validity of assessment

I received assessment from IEA on 28th january 2015, with skill level 1 as professional engineer,how many days this assessment is valid.At present I am 43 give some suggestion which visa is best suited to me.
According to migration regulations, skills assessments issued by assessing authorities for the purpose of visa applications is only valid until the expiry date specified on the assessment, or valid for three years from date of issue, whichever occurs first. Therefore, for VETASSESS skills assessments without an expiry date, the three-year validity period from the date of issue applies. If you need further assistance, please contact at migrate@vetassess.com.au