Try with this regex expression
System.Text.RegularExpressions.Regex.Match(YourString,"(?<=NOC\sValid\sFrom\s+)\S+").Tostring
Output -> 13-Oct-2022
System.Text.RegularExpressions.Regex.Match(YourString,"(?<=NOC\sValid\sTo\s+)\S+").Tostring
Output ->12-Oct-2023
Regards
Gokul