Part 10 Provision of Access and Interconnection. Section 51 General principles. Section 52 Rights and obligations of the Persons. Section 53 Powers and duties of the Commissioner. Section 54 Repealed with 44 of 51(I)O of 2012. Review of former obligations. Section 55 Imposition, amendment or withdrawal of obligations. Section 56 7 of 113(I) of 2007. Obligation of transparency. Section 57 Obligation of non-discrimination. Section 58 Obligation of accounting separation. Section 59 Obligations of access to and use of specific network facilities. Section 60 Price control and cost accounting obligations. Section 60A 49 of 51(I) of 2012. Functional separation. Section 60B 49 of 51(I) of 2012. Voluntary separation by a vertically integrated undertaking. Section 61 Accounting and structural separation and financial reports. Section 62 Co-location and facility sharing. Section 62A 6 of 104(I) of 2016. Access to existing physical infrastructure. Section 62B 6 of 104(I) of 2016. Transparency concerning physical infrastructure. Section 62C 6 of 104(I) of 2016. In-building physical infrastructure. Section 62D 6 of 104(I) of 2016. Access to in-building physical infrastructure. Section 63 52(a) of 51(I) of 2012. Interoperability of interactive digital television 5