Senedd administering officer Elin Jones has actually said she will not be going to the crowning of King Charles on Saturday.
The Plaid Cymru MS said “as a republican” it was “for others to commemorate a crowning”.
Welsh Conservative Senedd leader Andrew RT Davies called it a “extremely unexpected and frustrating choice” for somebody whose function was “apolitical”.
Deputy Presiding Officer and Labour MS David Rees will represent the Senedd at the event in Westminster Abbey.
Labour First Minister Mark Drakeford, likewise a republican politician, will be there for the Welsh federal government, as will Mr Davies however Plaid Cymru leader Adam Price will likewise not participate in.
In a declaration, the administering officer, likewise called the Llywydd, said: “I have actually taken a personal choice not to participate in the crowning.
“The Senedd will be represented by the deputy administering officer.
“As Llywydd I have actually engaged totally in all constitutional responsibilities with the Head of State and will continue to do so.
“However, as a republican politician, I consider it is for others to commemorate a crowning.
“I want the royal couple well in their years of service.”
Mr Davies highly criticised her choice, something celebration leader’s extremely hardly ever do to administering officers, asking if Ms Jones desired a more political function.
“The position of Llywydd is apolitical, their function is to represent Members of the Senedd and individuals of Wales, especially on crucial state celebrations, no matter their personal views,” he said.
“This is an extremely unexpected and frustrating choice by the Llywydd, today.
“Just the other day, the parliament over which Elin Jones administers all passed a movement to praise the King and Queen Consort on their crowning this weekend.
“If the administering officer desires a brand-new political job rather, she needs to advance her CV for the position of Plaid Cymru leader.”
Plaid Cymru’s leader Adam Price remains in substantial trouble after a report required the celebration to “cleanse a culture of harassment, bullying and misogyny”, and even a require Labour to ditch its co-operation handle Plaid by a previous cabinet minister.
There was a comparable rebuke from another previous Labour minister Alun Davies, who said Ms Jones was “not there to exercise her own bias however to represent the entire of our parliament and our country”.
The administering officer signed up with occasions to mark the death of Queen Elizabeth II and the King’s pronouncement event in 2015.
On Tuesday, Welsh federal government counsel basic, its lead legal consultant, Mick Antoniw, said Wales would be at the “leading edge” of the crowning, with a recently made Cross of Wales leading the procession.
A present of the King to the Church in Wales, the cross is made from Welsh products such as slate, recovered wood and silver from the Royal Mint in Llantrisant, Rhondda Cynon Taf.
It integrates an antique of the True Cross – said to be from the cross on which Jesus was crucified – provided to King Charles by Pope Francis.
Mr Antoniw informed the Senedd the occasion will include music by Welsh authors and Welsh artists.
It will include the very first Welsh language efficiency at a crowning – the “Coronation Kyrie” made up by Professor Paul Mealor from St Asaph, and sung by Sir Bryn Terfel and the choir of Westminster Abbey.