How much grace period do I get to pay my credit card bill of AU Small Finance Bank before a late fee is charged?

How many days does AU Small Finance Bank allow after the due date before charging a late fee? Does the grace period vary based on the type of credit card? Is interest still charged during the grace period, or is it completely free? What happens if the bill is not paid within the grace period? Are there any special cases where the grace period might be extended? Does the grace period apply to all transactions or only specific ones (like retail purchases vs. cash withdrawals)?

In order to prevent interest charges, AU Small Finance Bank offers a grace period on its credit cards that lasts between 18 and 48 days. Customers must pay the minimum debt by the due date indicated on their billing statement in order to avoid late fees and interest charges. Failure to do so may result in additional charges.
AU Bank