https://www.theguardian.com/technology/2023/may/25/elon-musk-neuralink-brain-implant-fda-approval-human-study

The Food and Drug Administration, which had initially rejected the application, finally gave the company the green light

Neuralink, Elon Musk’s brain-implant company, said on Thursday it had received a green light from the US Food and Drug Administration (FDA) to kickstart its first in-human clinical study, a critical milestone after earlier struggles to gain approval.