Here is a high-level introduction to the regulatory frameworks governing the implementation of Carbon Capture, Utilization and Storage (CCUS) technologies in the EU and Romania:

European Union Framework:

CCS Directive (Directive 2009/31/EC) is the primary EU-level legislation regulating Carbon Capture and Storage. It establishes a legal framework for the environmentally safe geological storage of CO2 to contribute to climate change mitigation. 

Key aspects:

Covers all CO2 storage in geological formations in the EU and the entire lifetime of storage sites.
• Lays out requirements for selecting storage sites and obtaining storage permits.
• Addresses closure, post-closure obligations, and transfer of responsibility to Member States.
• Requires operators to establish financial security before CO2 injection begins.

EU Emissions Trading System (EU ETS) interacts with CCS by considering captured and stored CO2 as "not emitted", potentially offsetting costs for operators. Carbon Removals Certification Framework is a recently agreed upon voluntary framework to help stimulate investment in carbon removal projects, including certain CCS and CCU initiatives.

EU Taxonomy classifies CCS and CO2 transport as sustainable investments, potentially directing more funding to these technologies.

Romanian Framework:

Emergency Government Ordinance 64/2011 is the legislation piece transposing the EU CCS Directive into Romanian law, establishing the legal groundwork for CO2 storage activities.

National Agency for Mineral Resources (NAMR)is designated as the competent authority for CO2 storage in Romania. National Regulatory Authority for Energy (ANRE) is the responsible for regulating CO2 transport through pipelines.

Secondary Legislation consists of two procedures which have been developed by NAMR for authorizing exploration and CO2 storage activities. However, CO2 transportation and its authorization have not yet been adequately regulated.

Key challenges in the Romanian framework include:

• There's a need to develop more integrated and efficient permitting processes.
• Further development of secondary legislation and procedures is required, particularly for CO2 transport.

Both the EU and Romanian frameworks aim to ensure safe and environmentally sound implementation of CCUS technologies while providing a basis for their development and deployment. However, there's ongoing work to refine and improve these frameworks to better facilitate CCUS projects and contribute to climate goals.