My TPS application was approved in 2016. However, the only time I applied for an EAD was the first time I applied for TPS (in 2015), which was approved. I haven't needed to it since I have an EAD through f1 OPT. I am wondering if I need to re-apply for work authorization to get an EAD through TPS, or if my initial TPS EAD is still valid. Thank you.