Some aspects may include determining whether to allow a skip over a portion of required content based on the amount of time elapsed since a portion of required content was played. The amount of time elapsed since a portion of required content was played may be measured based on the sum time of content played, or may be based on the amount of wall time elapsed. The determination of whether to allow a skip over a portion of required content may be made based on comparing the amount of time elapsed since a portion of required content was played to a threshold amount of time. Some aspects may allow free navigation within content if the amount of time elapsed is less than the threshold, and may restrict navigation or require playback of required content if the amount of time elapsed is greater than the threshold.