In this section, “pay period” means a period of not more than 31 consecutive days for which a payment of wages ordinarily is made to an individual by the employer of the individual. This section does not apply to employment that an individual performs for an employer in a pay period in which any of the employment is exempted under § 8-213(b) of this subtitle. If employment that an individual performs for an employer during at least one-half of a pay period is covered employment, then all of the employment during that pay period is covered employment. If employment that an individual performs for an employer during more than one-half of a pay period is not covered employment, then none of the employment during that pay period is covered.