in a way that is based on truth or reason, or that is able to be accepted

You can validly criticize management for being arrogant. 你完全有理由批评管理层的傲慢。

I think he can validly claim a widespread base of support. 我认为，他完全有理由声称自己拥有广泛的支持基础。

in a way that has legal force, or that is legally acceptable

4,018 votes of validly registered state residents had been missed in the original tally. 在最初的统计中，有4018名有效登记的州居民的选票被遗漏。

The attackers obtained 63 validly issued driver's licences . 袭击者获得了63张有效发放的驾照。