[corrected:] At no point in section 4.2, Incident Management, is determing the service ever mentioned. in fact services in general are hardly ever mentioned, other than refering to SLAs (for details see comment below).
Not even in incident categorisation or prioritisation or any activity. There is no mention of service impact analysis.
The CMS is only accessed to 'identify the CIs affected' and get 'relationships between CIs'. The Service Catalogue apparently doesn't exist.