Given the task definition and input, reply with output. Generate a correct and concise answer for the question based on the words in the context.

Context : The ARL 44s equipped the 503e Regiment de Chars de Combat stationed in Mourmelon-le-Grand and before the end of 1950 replaced seventeen Panther tanks used earlier by that unit.
Question : Which was the official year for the approval of ARL 44?
1950