IGST order of Utilization

Hi Sir or Madam

Good evening

We have IGST ITC every month

we don't have IGST liability

We use IGST ITC towards CGST liability and SGST liability

Is there any restrictions in using IGST ITC first towards CGST and Later SGST

or Can I use IGST ITC in any manner in any proportion towards discharge of CGST and SGST liability

Please advise

Thanks