Mae'r Ddeddf yn rhoi canolbwynt newydd ar bartneriaeth a chydweithredu mewn awdurdodau lleol ac ar draws ffiniau sefydliadol.  Ar gyfer plant a phobl ifanc a'u teuluoedd, bydd y dyletswyddau newydd hyn yn ganolog i ddull mwy cyfannol ac arloesol tuag at eu hanghenion. Mae llinellau nam sylweddol ar draws gwasanaethau i blant, sy’n effeithio, er enghraifft, ar sut yr ymdrinnir â phlant ag anableddau sy'n pontio i wasanaethau oedolion.  Mae'r Ddeddf yn darparu cyfleoedd sylweddol i unioni'r materion hyn gan alluogi awdurdodau lleol, byrddau iechyd a phartneriaid statudol eraill i weithio gyda'i gilydd o amgylch anghenion eu poblogaethau, fel y nodwyd gan yr asesiadau o'r boblogaeth o dan Ran 2, i wella llesiant.
The Act places a new focus on partnership and co-operation within local authorities and across organisational boundaries.  For children and young people and their families, these renewed duties will be at the centre of a more holistic and innovative approach to their needs. There are significant fault lines across services for children ,which impact, for example, on how the transition to adult services is handled for children with disabilities.  The Act provides significant opportunities to rectify these issues enabling local authorities, health boards and other statutory partners to work together around the needs of their populations, as identified by the population assessments under Part 2, to improve wellbeing.