According to the Learning Objectives:

• Hard law (regulations, delegated acts, implementing acts, and implementing rules);
• Soft law (certification specifications, acceptable means of compliance, and guidance material).

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When consulting the agency webpage to be updated with the EASA regulation, it is possible to observe that there are different kinds of regulations:

Hard Law. Implementing regulations are the laws that EASA proposes, but that have to go through the European Parliament to be finally accepted.
Soft Law. Acceptable means of compliance and guidance material and the Certification Specifications are the supporting material that the organisations have to comply together with the regulations. They are published directly by EASA, without having to go through the European Parliament.