The following contracts are open by default:
- Non-expired daily contracts of those months whose cascade process has occurred. The daily swap contract must always have, at least, the following 3 daily contracts.
- The next four weekly base contracts and the next two weekly peak contracts.
- The next four monthly base contracts and the next two monthly peak contracts.
- The next four quarterly base contracts and the next two quarterly peak contracts.
- The next two annual base contracts.
If members request so, other contracts whose delivery period is defined may be opened for registration.
