That landmark comes hot on the heels of the academy starlet becoming the youngest-ever Welsh Premiership player - coming off the bench for Newport against Pontypridd last weekend.
Amos' new title could be a brief one with teammate and centre Jack Dixon - at 16 years, 313 days - likely to make his regional debut off the bench at Adams Park.
And Beale believes the record-breaking weekend proves the future is bright at Rodney Parade.
"This is not a decision that we have taken lightly," said Beale. "Hallam's selection is part of our ongoing policy of developing young talent which is crucial to our business going forward.
"It's no coincidence that our previous youngest player was Jon Evans who is a part of the future here at the region.
"The emergence of players like Jon and Adam Hughes shows how important these opportunities are. I'm very excited for Hallam, Adams Park is a good place to go and get his first start.
"It's testament to our Academy staff that players are ready to play senior rugby at a younger age and this game will enable a very talented young player to kick off his regional career."