1 You can make use of the CDA to make payment for your initial one-time enrolment fee as well as subsequent annual fees till your child turns 7/12 years old*.he CDA is a special savings account that you open at any OCBC Bank or Standard Chartered Bank branch for your child who is eligible for CDA. You can save in the CDA any time until 31 December in the year your child turns 6 years of age.