The document summarizes key aspects of modernized Social Security Coordination regulations 883/2004 and 987/2009. It highlights innovations including inclusion of paternity benefits, explicit provisions for child-raising periods, new posting provisions, and improved procedures for healthcare cost reimbursement and recovery. It describes enhanced cooperation between institutions and new dialogue and conciliation mechanisms to resolve disputes. Determination of applicable legislation was clarified, strengthening the unicity and lex loci laboris principles. Transitional provisions were included. Innovations for sickness, maternity, pensions, and unemployment benefits were also summarized.