Vimy Resources Limited announced that it has formally submitted notification of "substantial commencement" of the Mulga Rock Uranium Project (Mulga Rock) to the Western Australian Department of Water and Environment Regulation (DWER). Implementation of Mulga Rock was approved under Ministerial Statement No. 1046 (MS 1046) on 16 December 2016. Under conditions 3-1 and 3-2 of MS 1046, Vimy is required to substantially commence implementation of the Proposal within five years and provide notification and supporting evidence. Since commencing the Early Works Program in late September 2021, Vimy has cleared approximately 143 hectares and stockpiled the corresponding soil and growth medium. The area cleared covers the first open cut mine pit under the approved Mining Proposal, the first `Overburden Landform', the area for the accommodation village and communications tower, borrow pits and upgrades to existing site access roads. Vimy has determined that the cumulative clearance of approximately 162 hectares and movement of approximately 800,000 bcm of soil and growth medium constitutes substantial commencement of implementation of the Proposal, as required under MS 1046. The area cleared covers the first open cut mine pit required to be cleared under the approved Mining Proposal, the first `Overburden Landform' associated with that pit (classified as `Associated Infrastructure'), the area for the accommodation village and communications tower, borrow pits and upgrades to site access roads, consistent with the project schedule. The topsoil and growth medium removal has taken place at both `Elements' in compliance with approved MS 1046, Conditional Environmental Management Plans, Project Management Plan, and Mining Proposal and Mine Closure Plan. Vimy and its predecessor companies have invested over $100 million (in 2021 dollars) in progressing Mulga Rock to the current stage of development. Since MS 1046 was issued in December 2016, Vimy has spent over $20 million on the development of Mulga Rock, with a further $8 million of expenditure approved for the completion of the Early Works Program which is currently underway and is scheduled to be completed by the end of January 2021. Development of Mulga Rock will have significant benefits to the Western Australian economy, including more than 550 personnel directly employed on the project during construction and the creation of approximately 350 site-based permanent employees and 25 Perth-based support personnel when in operation. Mulga Rock is expected to generate more than $200 million in state royalties over its 15-year mine life.