1. Introduction.Four new technology and product development activities are added in 2021, that have already been identified as useful to the foreseen development of next-generation 4S solutions over the coming years. These work plan activities will be issued under the legal framework of the ARTES 4.0 Strategic Programme Line (SPL) Space Systems for Safety and Security (4S).2. ImplementationPhasing: phasing of the contractual activities may be considered depending on the risks associated with the development, the maturity of the technologies, and potential early market perspectives.Parallel contracts: in accordance with the ARTES 4.0 ImplementingRules, parallel contracts can be awarded. Procurement Policy: the following procurement policies are foreseen for the proposed activities:C: Activities in open competition without any further restrictions. C1: Activities in open competition limited to non-Large System Integrators (LSIs) as prime. LSIs are allowed to participate as sub-contractors.C2: Activities are in open competition, where a significant participation of non-LSIs is requested.C3: Activities restricted to SMEs RD organisations, preferably in cooperation.C4: Activities in open competition, subject to the SME subcontracting clause.The full definition of these procurement policies is provided in document ESA/IPC(2005)87, rev.4.ITTs for activities will automatically be generated by the Executive. The approvedwork plan will be published on the EMITS website. The activities of the approved work plan will be included in the ARTES PlannedActivities Summary Table (https://artes.esa.int/artes-planned-activities-summary-table). That table will include the intended quarter of issue for each activity.