20% contingency fee based on that award. The appellant also seeks direct payment from the Secretary of 20% of the award of the TDIU benefits granted the veteran. Eligibility for TDIU is a rating question dependent on a grant of service connection. See 38 C.F.R. § 4.16. While the degree of disability under the VA rating schedule is based on the actual symptoma-tology of the disability and how .it affects employability, a TDIU rating is based on unemployability caused by one or more service-connected disabilities. Therefore, while a claim for service connection of a disability always raises the issue of degree of disability, the issue of TDIU must be reasonably raised based on the submissions of the claimant or the evidence of record. See Norris v. West, 12 Vet.App. 413, 420-21 (1999) (<HOLDING>), motion for full Court decision denied (July
holding that a ratingincrease claim includes a tdiu claim where veteran meets the section 416a schedular requirements and the record on appeal includes evidence of unemployability based on a serviceconnected disability or disabilities holding disability discrimination claim barred holding that an ineffective assistance of counsel claim must be raised on direct appeal when the facts supporting the claim are presented on the face of the record holding that regarded as claim was reasonably related to claim of discrimination on the basis of disability holding that once a veteran has properly made  a  claim for a current disability as a result of a specific inservice occurrence or aggravation of a disease or injury the agencys duty to assist  attaches to the investigation of all possible inservice causes of that current disability including those unknown to the veteran