there seems to be little contradiction of the TnC about the eligibility but those got it recently may be eligible too...

Campaign
1. The Standard Chartered Bank Malaysia Berhad ("the Bank") Liverpool FC Cashback credit card
Double Cashback Campaign (“Campaign”) commences on 1 March 2019 and ends on 31 May
2019, inclusive of both dates ("Campaign Period").
2. By participating in this Campaign, participants agree to be bound by all the terms and conditions
below.
Eligibility
3. This Campaign is open to Liverpool FC Cashback credit cards issued by the Bank (“SCBMB Card”)
whose cards were approved between 12 November 2018 – 30 April 2019, and who have
maintained all their accounts with the Bank in good standing, without any breach of the terms and
conditions or agreements, throughout the Campaign Period (“Eligible Cardholders).
4. Individuals below the age of 21 years are not eligible for this Campaign.
5. Cardholders whose accounts are cancelled, or terminated for any reason, or suspended for any
breach or suspected breach by the cardholder, during the Campaign Period or within 3 months after
the Campaign Period, will not be entitled to receive any rewards under this Campaign.