Del. Code 10, § 4302 : Courts And Judicial Procedures — Evidence And Witnesses — General Provisions — Competency to testify Date: 2 Sep 2016 TEXT PDF Current through 2016 Legislative Session, Act 399 No child under the age of 10 years may be excluded from giving testimony for the sole reason that such child does not understand the obligation of an oath. Such child's age and degree of understanding of the obligation of an oath may be considered by the trier of fact in judging the child's credibility. Del. C. § 4302 65 Del. Laws, c. 111, §1.;