Yes, an annual oil change should be covered. I think the rule though is that it has to be at least exactly one full calendar year since your last oil change (i.e. the service appointment should be like one year and one day since the previous one, or later).
Golden Gate BMWCCA - Car Control Clinics
'13 C4S/'12 328i/'04 GT3
Past: '09 M3 DCT/'03 M3 SMG/'95 M3... missing an E30 I suppose...