That investigation is ongoing and could take six months to complete.
Ministry spokesman Britton Broun said he could not go into detail about what aspects of Tree Adventures investigators had problems with because to do so "could interfere with the investigation into the death".
However, they were satisfied with the company's response to the prohibition notice.
"They have met the conditions of the notice, so they rectified the issues and as a result on the 22nd of March we lifted the prohibition notice," he said.
Tree Adventures director Jimmy Moore did not respond to questions about what changes had been implemented other than to say the company was co-operating with the ministry investigation.
The statement on its website said "all practicable steps" had been taken during the closure to "further strengthen and improve our safety systems".
After Mr Brabet's death, his widow, Liz, told the Herald that she was angry with criticism of the company and its safety procedures.
"People have been talking about how poor the training was, but it was very good.
"They took us out and showed us how to use the different parts of the apparatus."
She said Tree Adventures staff she and her husband spoke to on the day had clearly told them how to use their equipment. "I couldn't have asked for more."