No. In this industry the client has the right to select the model or talent that best suits the job. Talent Managers and Agents can suggest whom they feel might be the best selection for a specific job; however, the client makes the final selection.
The Agency will decide which division you will be placed in and then help you develop your marketing tools. For most modeling work you will need photos in a portfolio that show a variety of looks and a composite card. For acting and on camera TV work, you will need an 8 x 10 commercial headshot and resume. In both cases an on-line presence can be very beneficial and clients increasingly rely on finding models and talent using on-line portfolios (your management company or agency can show you how to obtain this).
Depending on the project. There can be work on the weekends. Promotional work, fashion shows and hair shows are often booked on weekends. Print and on camera TV work takes place Monday-Friday 9-5pm.
SIVAD represents talent on a non-exclusive basis. Talent will be free to work with other agencies as they see fit. Other companies to include, most fashion divisions are somewhat exclusive in each market. If you are a commercial or promotions model or an actor/actress, you are allowed to be with more then one agency as long as it is a non- exclusive contract with each.