The correct answer is option 'D' - Mandatory creation of marine parks in all CRZ-IV areas. This is not a feature of the CRZ Notification, 2018.

The Coastal Regulation Zone (CRZ) Notification, 2018 was introduced by the Ministry of Environment, Forest and Climate Change (MoEFCC) in January 2019. It aimed to streamline the coastal regulation process and provide a framework for sustainable development and conservation of coastal areas.

Let's discuss the features of the CRZ Notification, 2018 to understand why option 'D' is the correct answer:

1. Streamlining of CRZ clearances:
- The notification aimed to simplify and streamline the process of obtaining clearances for various activities in the coastal areas.
- The classification of CRZ areas was rationalized into four categories (CRZ-I, CRZ-II, CRZ-III, and CRZ-IV) based on their ecological sensitivity and development needs.

2. De-freezing of Floor Space Index (FSI) in CRZ-II areas:
- The CRZ Notification, 2018 allowed the state and Union Territory governments to formulate their own policies for construction activities in CRZ-II areas.
- The earlier restriction on the FSI was removed, giving more flexibility to the local authorities to decide on the permissible FSI.

3. Establishment of a hazard line for coastal areas:
- The notification introduced the concept of a hazard line, which is a line demarcating the area likely to be affected by coastal hazards such as sea-level rise, storms, and erosion.
- It aimed to regulate development activities and prevent construction in areas prone to hazards, ensuring the safety of coastal communities.

4. Mandatory creation of marine parks in all CRZ-IV areas:
- This statement is not a feature of the CRZ Notification, 2018.
- CRZ-IV areas are designated as the areas that are undeveloped or lightly developed, and they have been excluded from the purview of the CRZ Notification, 2018.
- The notification does not mandate the creation of marine parks in CRZ-IV areas.

In conclusion, the correct answer is option 'D' - Mandatory creation of marine parks in all CRZ-IV areas. This is not a feature of the CRZ Notification, 2018. The notification focuses on streamlining clearances, de-freezing FSI in CRZ-II areas, and establishing a hazard line for coastal areas.