Israel’s attorney general has told Benjamin Netanyahu that he must not be involved in an overhaul to the country’s judicial system proposed by his government because it would amount to a conflict of interest over the prime minister’s corruption trial, according to a letter made public Thursday. Netanyahu’s new far-right government has made changing the legal system a centrepiece of its legislative agenda and despite mounting public criticism, has charged ahead with steps to weaken the supreme court and grant politicians less judicial oversight in their policymaking. The office of attorney general, Gali Baharav-Miara, also released her legal opinion concerning the proposed changes, and said they would deal “a serious blow to the system of checks and balances” in Israel’s government, and would give the executive and legislature “broad and effectively unlimited authority”. Netanyahu is on trial for fraud, breach of trust and accepting bribes in a series of scandals involving influential media moguls and wealthy associates. He denies wrongdoing. “You must avoid as part of your role as prime minister involvement in initiatives related to the legal system,” Baharav-Miara wrote to Netanyahu in the letter, which was sent Wednesday. She said that meant Netanyahu could also not direct others to advance the plan. The letter included an opinion by Baharav-Miara’s deputy, saying the overhaul would “benefit the prime minister in terms of the administration of his trial”. It said the changes would allow the governing coalition to more easily advance legislation that could assist Netanyahu. The heads of the parties in Netanyahu’s government said they “reject outright” the attorney general’s stance, saying it was an attempt to thwart the legal changes. Amir Fuchs, a senior researcher at the Israel Democracy Institute, a Jerusalem thinktank, said Baharav-Miara’s position won’t affect the plan’s progress. He said the attorney general’s position is binding, meaning Netanyahu won’t be able to deal with the legal changes, and neither will any of his political appointees on his behalf. But ministers in his government should be able to, he said. The judicial overhaul was launched by the country’s justice minister, a close confidante of Netanyahu’s, and the Israeli leader has touted it as the right step for the country. Asked about moves to alter the judiciary by a leader on trial in an interview with CNN this week, Netanyahu said: “[N]one of the reforms that we’re talking about … have anything to do with my trial.” Baharav-Miara’s stance is only likely to deepen a rift in Israel over the power of the judiciary, which has roiled the country since the government took power later last year. The plan would allow a simple majority of the country’s 120-seat parliament to overturn supreme court decisions that deem laws unconstitutional. It would grant the government more power over the appointment of judges. And it would allow government ministers to ignore the advice of legal counsellors and make the position less independent. Critics say the plan upends Israel’s system of checks and balances and strips minorities of the ultimate protector of their rights, the supreme court. They say it grants politicians too much power and would be destructive to Israel’s democratic fundamentals. The plan has faced widespread opposition, from top legal officials to economists and the country’s robust tech sector to tens of thousands of ordinary Israelis who have come out to protest the move. The government says the plan is critical to streamlining governance and correcting an imbalance of power between the country’s executive and judicial branches, which they say has made the courts too powerful.