Final answer:
The question is regarding the age requirements and potential waivers for OCS candidates in the Surface Warfare (Nuclear) and Submarine categories. The exact age until which waivers are considered is not specified.
Step-by-step explanation:
The question pertains to the age requirements and waiver policies for Officer Candidate School (OCS) candidates interested in Surface Warfare (Nuclear) or Submarine roles. While candidates must be at least 19 years of age and be commissioned before reaching 26 and a half years old, there is room for waivers. Although the exact age up to which waivers may be considered is not provided here, in the broader context of military service, age waivers are typically influenced by factors such as military needs, applicant qualifications, and branch-specific policies. The Military Service Act mentioned refers to historical legislation regarding military service eligibility and exemptions but does not directly provide the waiver age for the modern U.S. Navy Officer Candidate School programs.