Access to your account(s) is controlled by you. Unless you grant ongoing access to a TPP, which can for a maximum of 90 days you will have to be involved every time the TPP accesses your account. This will involve completing SCA from September 2019 (see above).
If you want, you can give an AISP permission to access your payment account(s) for up to 90 days, during which time they may access your account(s) up to four times a day without your involvement. This will allow them to monitor your account activity when providing their services to you without you having to log-on as well. Any renewal or extension of this ongoing access permission for the AISP will require you to complete SCA with us from September 2019.
If you are using a PISP, you are required to be involved in every transaction when the PISP contacts us on your behalf. A PISP cannot have ongoing access to your account.