I am looking at the common property memorandum published on the NSW fair trading web site. it could be different from your own strata plan’s wording might be different. You have not shown us the wording.
From the NSW Fair Trading version: Only the skirting board on the common property wall is the responsibility of the owners corporation. The other skirting board is lot owner’s responsibility. Painting on all skirting boards (irrespective of whether it is a common property wall) is lot owner’s responsibility.
I had skirting boards installed earlier this year (2023). They cost $7.70 per metre for the materials and $7.15 per metre for installation (GST included). Painting was extra cost.