The following validation rule is not correct:
v2816_m: sum({F 32.01, r030, (c010, c060)}) = sum({F 01.01, c010, (r070, r093, r110, r150, r172, r176, r235)})’.

This validation rule excludes row 260 of F 01.01. An entity has to disclose ‘Investments in subsidiaries, joint ventures and associates’ in this row.

By definition, row 260 of F 01.01 includes equity shares that are representing the ownership in subsidiary, joint ventures or associates.

Asset encumbrance Reporting VS Finrep Reporting - Equity instrument's definition not aligned

Validation rule v2816_m actually establishes a correspondence between the Asset Encumbrance overview template (template F 32.01 of Annex XVI to Regulation (EU) No 680/2014 – ITS on Supervisory Reporting) and the FINREP template F 01.01 of Annexes III and IV to the ITS on Supervisory Reporting which reflects the total assets reported by an institution for financial reporting purposes. More specifically, this validation rule ensures that the total carrying amount of encumbered and unencumbered equity shares reported in template F 32.01 matches with the total amount of equity shares reported by an institution in its financial statements.

As mentioned in the question, validation rule v2816_m does not include row 260 of template F 01.01 which corresponds to ‘investments in subsidiaries, joint ventures and associates’.

Conversely, validation rule v2823_m ensures that the total amount of encumbered and unencumbered ‘other assets’ reported in row 120 of template F 32.01 matches, among others, with the amount of assets reported in row 260 of template F 01.01.

Consequently, equity shares corresponding to ‘investments in subsidiaries, joint ventures and associates’ reported in row 260 of template F 01.01 should be reported in row 120 ‘other assets’ of template F 32.01, either as encumbered or unencumbered assets.