Does "resume own navigation" also mean "altitude your discretion"? In VFR flights from class C, I sometimes get resume own navigation, altitude your discretion after departure and sometimes just resume own navigation. 

Does resume own navigation alone mean altitude your direction as well?

Update:

Let's assume scenario below for KSNA and to be more specific:

Pilot to Clearance Delivery: 529J with request

Clearance Delivery: 529J go ahead

Pilot to Clearance Delivery: 529J is Cessna 172/u west side parking, requesting 
El Toro departure to Chino with information Bravo

Clearance Delivery to Pilot: After Departure turn left heading 080, Maintain VFR at or below 2400, SoCal on 124.1, SQUAWK 0210

Pilot: reads back …

Pilot starts taxi then take off with proper radio communication with ground and tower. After departure Tower hands pilot over to SoCal.

Pilot to SoCal (initial call): SoCal 529J departed John Wayne, 1100 climbing, requesting 3000 to Chino

SoCal to pilot:  529J resume own navigation

Here is the confusion, sometime SoCal comes back with only resume own navigation. Does this mean pilot can climb to 3000 or altitude restriction for 2400 still valid?
At this time, the definition of "resume own navigation" is very varied from group to group. ATC Controllers say that if there is an altitude restriction, they have to clear it. So safest thing to do is to ask for clarification if you had an altitude restriction/not told "altitude your discretion" that would continue into the "resume own navigation" exactly what you are doing now.

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