Clause 3(1) of the Principal Order is amended as follows:(a) by inserting the following definition after the definition of Act :amendment commencement date means the day on which the Electricity Supply Industry Concession Amendment Order 2015 comes into force;(b) by omitting "cooling" from paragraph (b) of the definition of corresponding concession and substituting "cooling or heating" ;(c) by omitting "Commonwealth." from the definition of specified bridging visa and substituting "Commonwealth;" ;(d) by inserting the following definition after the definition of specified bridging visa :surviving spouse , in relation to a deceased person, means (a) the person to whom the deceased person was married immediately before the death of the deceased person; and(b) if the deceased person (whether or not he or she was, at the time of his or her death, married to a person) was, immediately before his or her death, in a significant relationship, within the meaning of the Relationships Act 2003 , with another person that other person.