Following the September 2015 Liberal leadership ballot where Malcolm Turnbull became the Prime Minister, Frydenberg was appointed the Minister for Resources, Energy and Northern Australia in the First Turnbull Ministry.
In February 2016, the Nationals Matt Canavan took over responsibility for Northern Australia in the rearranged ministry.

In 2015, he declared that he had switched positions regarding same-sex marriage and publicly supported same sex marriage.

With the re-election of the Turnbull Government in 2016, Frydenberg became the Minister for the Environment and Energy in the Second Turnbull Ministry.

In the course of the 2017-18 Australian parliamentary eligibility crisis, suggestions were raised that Frydenberg might be in breach of Section 44 of the Constitution of Australia as his mother and her family had come to Australia as refugees from Hungary and his mother might be automatically considered a Hungarian citizen, so that Frydenberg would automatically have Hungarian citizenship by descent.
Frydenberg rejected the claim, asserting that his mother had become stateless due to the war;  he said that Hungary's imposition of citizenship on stateless refugees was akin to North Korea's imposing of citizenship.
Documents from the National Archives show that Frydenberg's grandparents and mother were considered "Hungarian" when they arrived in Australia, but had applied for a certificate of exemption (from the provisions of the Immigration Act 1901–1949), listing their nationality as "stateless".
Frydenberg said that this is evidence that his mother was stateless when she came to Australia.
Labor Party MPs were split on whether the matter should be investigated:  Mark Dreyfus indicated that he would pursue the matter, but other Labor MPs requested that he desist.
Ed Husic said that he felt uncomfortable with his party questioning the legal citizenship of stateless Jewish refugees escaping Europe.
Mark Butler stated that it was not the party's official position to pursue the matter.
Following the September 2015 Liberal leadership ballot where Malcolm Turnbull became the Prime Minister, Frydenberg was appointed the Minister for Resources, Energy and Northern Australia in the First Turnbull Ministry. In February 2016, the Nationals Matt Canavan took over responsibility for Northern Australia in the rearranged ministry.
In 2015, he declared that he had switched positions regarding same-sex marriage and publicly supported same sex marriage.
With the re-election of the Turnbull Government in 2016, Frydenberg became the Minister for the Environment and Energy in the Second Turnbull Ministry.
In the course of the 2017-18 Australian parliamentary eligibility crisis, suggestions were raised that Frydenberg might be in breach of Section 44 of the Constitution of Australia as his mother and her family had come to Australia as refugees from Hungary and his mother might be automatically considered a Hungarian citizen, so that Frydenberg would automatically have Hungarian citizenship by descent. Frydenberg rejected the claim, asserting that his mother had become stateless due to the war;  he said that Hungary's imposition of citizenship on stateless refugees was akin to North Korea's imposing of citizenship. Documents from the National Archives show that Frydenberg's grandparents and mother were considered "Hungarian" when they arrived in Australia, but had applied for a certificate of exemption (from the provisions of the Immigration Act 1901–1949), listing their nationality as "stateless". Frydenberg said that this is evidence that his mother was stateless when she came to Australia. Labor Party MPs were split on whether the matter should be investigated:  Mark Dreyfus indicated that he would pursue the matter, but other Labor MPs requested that he desist. Ed Husic said that he felt uncomfortable with his party questioning the legal citizenship of stateless Jewish refugees escaping Europe. Mark Butler stated that it was not the party's official position to pursue the matter.
Josh Frydenberg