function Get-Designations {
<#
.SYNOPSIS
    Get the list of designations for a given ProfileName

.PARAMETER ProfileName
    A valid ProfileName
#>
    [CmdletBinding()]
    [OutputType([string[]])]
    param (
        [Parameter(Mandatory = $false)]
        [string]$ProfileName = (Get-LocalCachedAWSProfile)
    )

    $logLead = (Get-LogLeadName)

    Assert-ValidAWSProfileName -ProfileName $ProfileName

    $cachePath = Get-CachePathDesignations -ProfileName $ProfileName

    if (!(Test-Path -Path $cachePath)) {
        Write-Warning "$logLead : No file found at [$cachePath]. You probably should call Checkpoint-EC2Instances -ProfileName $ProfileName"
        return @()
    }

    $item = Get-Item -Path $cachePath
    if (Test-WasFileModifiedWithin -Path $cachePath -Last Week) {
        if (Test-IsCurrentAWSUserSessionValid -ProfileName $ProfileName) {
            Write-Information "$logLead : Instance information is more than 7 days out of date, and you have a valid session token. Updating EC2 instance information."
            Checkpoint-EC2Instances -ProfileName $ProfileName
        } else {
            Write-Warning "$logLead : Your $ProfileName designations file is more than 7 days out of date. Do you need to run [Checkpoint-EC2Instances -ProfileName $ProfileName] again?"
        }
    }

    return (Get-Content $cachePath)
}