Yes. Employers can generally do anything that is not specifically prohibited by law or the collective bargaining agreement.
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Note.
If a uniform is required for work, it is NORMALLY up to the employer to provide this for their employees. If the employer does this then they may have negotiated with a specific vendor for this provision (to get the best price). In this case the vendor should not charge you for the uniform but will invoice the company directly.
One can purchase water guns online from a number of retailers. They are available to purchase from retailers such as Amazon, eBay, Walmart and Toys R Us.
Canon imagePROGRAPF printers are available for purchase from a number of retailers. Such retailers include Newegg, Amazon, and directly from Canon's website.
Buffalo tools are available for purchase from a number of retailers. Such retailers include Sears, Home Depot, and Walmart. They can also be ordered from Amazon.
Apps for IPads are widely available for purchasing online from tech retailers. Also one can purchase these apps from retailers such as Amazon and Ebay.
Many online retailers have portable sawmills available for purchase. Examples of these retailers include Woodmizer, Norwood Sawmills, and TimberKing Sawmills.
Medela nursing bras are available for purchase from a number of retailers. Some such retailers include Target, Gap, Walmart, Diapers dot com, Toys 'R Us, and Amazon.
Spenco insoles are available at many different retailers. Some of the most common retailers are Spenco and Walgreens. The cheapest are available at Amazon.
Stylish strappy sandals are available for purchase from a number of retailers. Such retailers include Target, Designer Shoe Warehouse, and Aldo. Stylish strappy sandals are also available online from Amazon.
LaCie USB drives are available for purchase from a number of retailers. Such retailers include Walmart and Newegg. They can also be ordered directly from LaCie's website.
Such soundboards are widely available on the internet. In fact, free downloadable versions are widely available. However, there are soundboards that are available for purchase on online retailers such as Amazon.
Doug Hyde prints are available to purchase from online art retailers such as Buy Fineart, and general retailers such as Amazon. Special edition prints are available from specialist retailers such as CollectorsPrints.
Cotton rugs are common and are available for purchase from a variety of retailers. Some retailers are Home Decorators Collection, JCPenny, Home Depot, Target, and Walmart.